/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/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:49:56,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:49:56,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:49:56,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:49:56,277 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 15:49:56,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:49:56,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:49:56,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:49:56,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:49:56,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:49:56,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:49:56,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:49:56,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:49:56,302 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:49:56,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:49:56,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:49:56,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:49:56,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:49:56,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:49:56,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:49:56,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:49:56,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:49:56,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:49:56,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:49:56,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:49:56,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:49:56,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:49:56,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:49:56,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:49:56,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:49:56,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:49:56,533 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:49:56,534 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:49:56,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2022-01-28 15:49:56,535 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2022-01-28 15:49:56,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:49:56,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:49:56,558 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:49:56,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:49:56,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:49:56,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,582 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:49:56,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:49:56,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:49:56,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:49:56,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:49:56,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:49:56,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:49:56,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:49:56,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:49:56,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/1) ... [2022-01-28 15:49:56,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:49:56,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:56,621 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 15:49:56,636 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 15:49:56,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:49:56,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:49:56,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:49:56,659 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:49:56,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:49:56,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:49:56,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:49:56,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:49:56,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:49:56,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:49:56,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:49:56,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:49:56,660 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 15:49:56,692 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:49:56,693 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:49:56,759 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:49:56,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:49:56,768 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:49:56,769 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:49:56 BoogieIcfgContainer [2022-01-28 15:49:56,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:49:56,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:49:56,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:49:56,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:49:56,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:49:56" (1/2) ... [2022-01-28 15:49:56,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399c90de and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:49:56, skipping insertion in model container [2022-01-28 15:49:56,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:49:56" (2/2) ... [2022-01-28 15:49:56,774 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2022-01-28 15:49:56,777 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:49:56,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:49:56,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:49:56,777 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:49:56,796 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 15:49:56,822 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:49:56,827 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 15:49:56,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 15:49:56,833 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-28 15:49:56,863 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 15:49:56,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:56,872 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 15:49:56,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:56,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2022-01-28 15:49:56,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146386880] [2022-01-28 15:49:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:56,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:57,028 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 15:49:57,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146386880] [2022-01-28 15:49:57,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146386880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:49:57,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:49:57,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:49:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159781043] [2022-01-28 15:49:57,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:49:57,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:49:57,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:49:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:49:57,069 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 15:49:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:57,127 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-28 15:49:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:49:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 15:49:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:57,146 INFO L225 Difference]: With dead ends: 217 [2022-01-28 15:49:57,146 INFO L226 Difference]: Without dead ends: 202 [2022-01-28 15:49:57,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:49:57,152 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:57,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:49:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-28 15:49:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-28 15:49:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-28 15:49:57,238 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-28 15:49:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:57,239 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-28 15:49:57,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 15:49:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-28 15:49:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 15:49:57,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:57,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:57,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:49:57,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:57,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2022-01-28 15:49:57,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:57,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159348201] [2022-01-28 15:49:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:57,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:57,331 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 15:49:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159348201] [2022-01-28 15:49:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159348201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:49:57,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:49:57,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:49:57,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806401690] [2022-01-28 15:49:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:49:57,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:49:57,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:49:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:49:57,334 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:57,370 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-28 15:49:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:49:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 15:49:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:57,372 INFO L225 Difference]: With dead ends: 158 [2022-01-28 15:49:57,372 INFO L226 Difference]: Without dead ends: 158 [2022-01-28 15:49:57,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 15:49:57,373 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:57,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:49:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-28 15:49:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-28 15:49:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-28 15:49:57,387 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-28 15:49:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-28 15:49:57,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-28 15:49:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 15:49:57,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:57,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 15:49:57,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2022-01-28 15:49:57,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678890070] [2022-01-28 15:49:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:57,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:57,430 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 15:49:57,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678890070] [2022-01-28 15:49:57,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678890070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:49:57,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:49:57,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:49:57,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820817216] [2022-01-28 15:49:57,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:49:57,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:49:57,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:49:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:49:57,432 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:57,474 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-28 15:49:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:49:57,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 15:49:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:57,476 INFO L225 Difference]: With dead ends: 183 [2022-01-28 15:49:57,476 INFO L226 Difference]: Without dead ends: 183 [2022-01-28 15:49:57,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 15:49:57,477 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:57,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:49:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-28 15:49:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-28 15:49:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-28 15:49:57,487 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-28 15:49:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:57,487 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-28 15:49:57,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-28 15:49:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:49:57,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:57,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:57,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:49:57,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2022-01-28 15:49:57,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:57,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788878436] [2022-01-28 15:49:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:57,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:57,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788878436] [2022-01-28 15:49:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788878436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206810192] [2022-01-28 15:49:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:57,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:57,782 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 15:49:57,802 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 15:49:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:49:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:58,150 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 44 treesize of output 32 [2022-01-28 15:49:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:58,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:58,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:58,365 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 45 treesize of output 41 [2022-01-28 15:49:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:58,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206810192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:58,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:58,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-28 15:49:58,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001418625] [2022-01-28 15:49:58,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:58,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:49:58,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:49:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:49:58,551 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:49:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:58,823 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-28 15:49:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:49:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-28 15:49:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:58,826 INFO L225 Difference]: With dead ends: 366 [2022-01-28 15:49:58,826 INFO L226 Difference]: Without dead ends: 351 [2022-01-28 15:49:58,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:49:58,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:58,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 61 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:49:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-28 15:49:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-28 15:49:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-28 15:49:58,845 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-28 15:49:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-28 15:49:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:49:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-28 15:49:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:49:58,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:58,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:58,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-28 15:49:59,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:59,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2022-01-28 15:49:59,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315595133] [2022-01-28 15:49:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:59,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:59,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315595133] [2022-01-28 15:49:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315595133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570309722] [2022-01-28 15:49:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:49:59,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:59,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:59,253 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 15:49:59,254 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 15:49:59,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:49:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:49:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:59,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:59,468 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 43 treesize of output 39 [2022-01-28 15:49:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:59,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:59,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:59,927 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 45 treesize of output 41 [2022-01-28 15:50:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570309722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:00,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:00,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-01-28 15:50:00,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680976581] [2022-01-28 15:50:00,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:50:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:50:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:50:00,147 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:00,961 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-28 15:50:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:50:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-28 15:50:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:00,964 INFO L225 Difference]: With dead ends: 478 [2022-01-28 15:50:00,964 INFO L226 Difference]: Without dead ends: 463 [2022-01-28 15:50:00,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:00,965 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:00,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 113 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-28 15:50:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-28 15:50:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-28 15:50:00,974 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-28 15:50:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:00,974 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-28 15:50:00,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-28 15:50:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:50:00,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:00,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:01,018 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 15:50:01,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:01,193 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2022-01-28 15:50:01,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:01,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80350477] [2022-01-28 15:50:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:01,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:01,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80350477] [2022-01-28 15:50:01,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80350477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276772514] [2022-01-28 15:50:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:01,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:01,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:01,337 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 15:50:01,337 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 15:50:01,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:50:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:50:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:01,545 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 44 treesize of output 32 [2022-01-28 15:50:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:01,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:01,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:01,703 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 45 treesize of output 41 [2022-01-28 15:50:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:01,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276772514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:01,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:01,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:50:01,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336025465] [2022-01-28 15:50:01,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:01,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:50:01,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:50:01,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:01,813 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:02,138 INFO L93 Difference]: Finished difference Result 418 states and 1203 transitions. [2022-01-28 15:50:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:50:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-28 15:50:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:02,141 INFO L225 Difference]: With dead ends: 418 [2022-01-28 15:50:02,141 INFO L226 Difference]: Without dead ends: 403 [2022-01-28 15:50:02,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:50:02,142 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:02,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 104 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-28 15:50:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2022-01-28 15:50:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-28 15:50:02,149 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-28 15:50:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:02,149 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-28 15:50:02,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-28 15:50:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:50:02,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:02,150 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, 1, 1] [2022-01-28 15:50:02,166 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 15:50:02,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:02,369 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2022-01-28 15:50:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:02,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161826508] [2022-01-28 15:50:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:02,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:02,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161826508] [2022-01-28 15:50:02,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161826508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102551767] [2022-01-28 15:50:02,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:02,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:02,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:02,490 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 15:50:02,492 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 15:50:02,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:50:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:02,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:02,678 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 43 treesize of output 39 [2022-01-28 15:50:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:03,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:03,021 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 45 treesize of output 41 [2022-01-28 15:50:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:03,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102551767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:03,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:03,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-28 15:50:03,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198015882] [2022-01-28 15:50:03,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:03,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:03,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:03,134 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:50:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:03,362 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-28 15:50:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:50:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 22 [2022-01-28 15:50:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:03,366 INFO L225 Difference]: With dead ends: 374 [2022-01-28 15:50:03,366 INFO L226 Difference]: Without dead ends: 359 [2022-01-28 15:50:03,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:50:03,367 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 119 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:03,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 108 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 219 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-28 15:50:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-28 15:50:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-28 15:50:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-28 15:50:03,375 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-28 15:50:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:03,375 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-28 15:50:03,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:50:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-28 15:50:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:50:03,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:03,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:03,413 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 15:50:03,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:03,578 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1412835854, now seen corresponding path program 5 times [2022-01-28 15:50:03,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409812369] [2022-01-28 15:50:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:03,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:03,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409812369] [2022-01-28 15:50:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409812369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511665434] [2022-01-28 15:50:03,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:03,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:03,692 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 15:50:03,694 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 15:50:03,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:50:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:03,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:03,864 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 43 treesize of output 39 [2022-01-28 15:50:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:04,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:04,096 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 45 treesize of output 41 [2022-01-28 15:50:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511665434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:04,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 15:50:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025010975] [2022-01-28 15:50:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:04,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:04,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:04,220 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 15:50:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:05,065 INFO L93 Difference]: Finished difference Result 693 states and 1991 transitions. [2022-01-28 15:50:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:50:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-01-28 15:50:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:05,068 INFO L225 Difference]: With dead ends: 693 [2022-01-28 15:50:05,068 INFO L226 Difference]: Without dead ends: 678 [2022-01-28 15:50:05,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:50:05,069 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 201 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:05,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 177 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:50:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-28 15:50:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 247. [2022-01-28 15:50:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-28 15:50:05,079 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-28 15:50:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:05,079 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-28 15:50:05,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 15:50:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-28 15:50:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 15:50:05,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:05,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:05,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-28 15:50:05,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:05,296 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1953349004, now seen corresponding path program 6 times [2022-01-28 15:50:05,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:05,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131775086] [2022-01-28 15:50:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:05,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:05,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131775086] [2022-01-28 15:50:05,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131775086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623837048] [2022-01-28 15:50:05,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:05,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:05,448 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 15:50:05,449 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 15:50:05,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:50:05,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 15:50:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:05,592 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 45 treesize of output 33 [2022-01-28 15:50:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:05,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:05,692 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-01-28 15:50:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:05,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623837048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:05,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:05,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-28 15:50:05,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993069273] [2022-01-28 15:50:05,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:05,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:05,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:05,812 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 15:50:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:06,544 INFO L93 Difference]: Finished difference Result 478 states and 1381 transitions. [2022-01-28 15:50:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:50:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 22 [2022-01-28 15:50:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:06,547 INFO L225 Difference]: With dead ends: 478 [2022-01-28 15:50:06,547 INFO L226 Difference]: Without dead ends: 463 [2022-01-28 15:50:06,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:50:06,548 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:06,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 175 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-28 15:50:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 247. [2022-01-28 15:50:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-28 15:50:06,553 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-28 15:50:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:06,553 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-28 15:50:06,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 15:50:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-28 15:50:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:06,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:06,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:06,582 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 15:50:06,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:06,755 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 7 times [2022-01-28 15:50:06,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:06,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884837073] [2022-01-28 15:50:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:06,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:06,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884837073] [2022-01-28 15:50:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884837073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830731832] [2022-01-28 15:50:06,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:06,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:06,800 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 15:50:06,801 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 15:50:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:06,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:06,912 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 15:50:06,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:06,992 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 15:50:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830731832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:06,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:06,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:50:06,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054520858] [2022-01-28 15:50:06,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:06,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:50:06,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:50:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:06,993 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:07,728 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-01-28 15:50:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-28 15:50:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:07,733 INFO L225 Difference]: With dead ends: 1099 [2022-01-28 15:50:07,733 INFO L226 Difference]: Without dead ends: 1099 [2022-01-28 15:50:07,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:50:07,735 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 303 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:07,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 204 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-28 15:50:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-01-28 15:50:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-01-28 15:50:07,782 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-01-28 15:50:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:07,782 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-01-28 15:50:07,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-01-28 15:50:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:07,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:07,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:07,801 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 15:50:07,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:07,988 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:07,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 8 times [2022-01-28 15:50:07,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:07,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615749646] [2022-01-28 15:50:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:07,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:08,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:08,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615749646] [2022-01-28 15:50:08,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615749646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:08,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453397451] [2022-01-28 15:50:08,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:08,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:08,050 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 15:50:08,063 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 15:50:08,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:08,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:08,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453397451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:08,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:50:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266131982] [2022-01-28 15:50:08,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:08,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:08,286 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:09,609 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-01-28 15:50:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-28 15:50:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:09,616 INFO L225 Difference]: With dead ends: 1794 [2022-01-28 15:50:09,616 INFO L226 Difference]: Without dead ends: 1794 [2022-01-28 15:50:09,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 15:50:09,620 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 460 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:09,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 296 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:50:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-01-28 15:50:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-01-28 15:50:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-28 15:50:09,649 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-28 15:50:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-28 15:50:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-28 15:50:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:09,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:09,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:09,675 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 15:50:09,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-28 15:50:09,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 9 times [2022-01-28 15:50:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320277649] [2022-01-28 15:50:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:09,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:09,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320277649] [2022-01-28 15:50:09,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320277649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582120737] [2022-01-28 15:50:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:09,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:09,921 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 15:50:09,922 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 15:50:09,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:50:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:10,001 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 15:50:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:10,067 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 15:50:10,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582120737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:10,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:10,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:50:10,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104763647] [2022-01-28 15:50:10,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:10,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:10,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:10,068 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:10,694 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-28 15:50:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:50:10,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:10,714 INFO L225 Difference]: With dead ends: 1470 [2022-01-28 15:50:10,714 INFO L226 Difference]: Without dead ends: 1470 [2022-01-28 15:50:10,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 15:50:10,715 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 405 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:10,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 275 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-28 15:50:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-28 15:50:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-28 15:50:10,726 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-28 15:50:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:10,727 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-28 15:50:10,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-28 15:50:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:10,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:10,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:10,745 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 15:50:10,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:10,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2022-01-28 15:50:10,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:10,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61443031] [2022-01-28 15:50:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:10,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:10,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61443031] [2022-01-28 15:50:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61443031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104146850] [2022-01-28 15:50:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:10,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:10,987 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 15:50:10,988 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 15:50:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:50:11,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104146850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:11,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-28 15:50:11,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349744285] [2022-01-28 15:50:11,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:50:11,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:50:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:50:11,091 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 15:50:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:11,185 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-28 15:50:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:50:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-28 15:50:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:11,187 INFO L225 Difference]: With dead ends: 685 [2022-01-28 15:50:11,187 INFO L226 Difference]: Without dead ends: 679 [2022-01-28 15:50:11,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:11,188 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:11,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 47 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-28 15:50:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-28 15:50:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-28 15:50:11,197 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-28 15:50:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:11,202 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-28 15:50:11,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 15:50:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-28 15:50:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:11,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:11,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:11,219 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 15:50:11,404 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,SelfDestructingSolverStorable12 [2022-01-28 15:50:11,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 10 times [2022-01-28 15:50:11,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:11,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119213487] [2022-01-28 15:50:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:11,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:11,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119213487] [2022-01-28 15:50:11,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119213487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:11,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481806294] [2022-01-28 15:50:11,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:11,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:11,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:11,456 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 15:50:11,457 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 15:50:11,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481806294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:11,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:11,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:50:11,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911106391] [2022-01-28 15:50:11,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:11,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:50:11,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:50:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:11,651 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:11,941 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-28 15:50:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:50:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:11,945 INFO L225 Difference]: With dead ends: 1159 [2022-01-28 15:50:11,945 INFO L226 Difference]: Without dead ends: 1111 [2022-01-28 15:50:11,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:11,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:11,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 106 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-28 15:50:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-28 15:50:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-28 15:50:11,960 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-28 15:50:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:11,961 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-28 15:50:11,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-28 15:50:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:11,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:11,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:11,980 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 15:50:12,175 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,SelfDestructingSolverStorable13 [2022-01-28 15:50:12,175 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2022-01-28 15:50:12,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:12,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469892716] [2022-01-28 15:50:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:12,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:12,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469892716] [2022-01-28 15:50:12,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469892716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633760107] [2022-01-28 15:50:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:12,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:12,212 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 15:50:12,213 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 15:50:12,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:50:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633760107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:12,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:12,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-28 15:50:12,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408691132] [2022-01-28 15:50:12,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:12,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:50:12,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:50:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:50:12,382 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 15:50:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:12,558 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-28 15:50:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:50:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-28 15:50:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:12,562 INFO L225 Difference]: With dead ends: 1267 [2022-01-28 15:50:12,563 INFO L226 Difference]: Without dead ends: 1267 [2022-01-28 15:50:12,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:50:12,563 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:12,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 66 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-28 15:50:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-28 15:50:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-28 15:50:12,577 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-28 15:50:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:12,578 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-28 15:50:12,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 15:50:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-28 15:50:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:12,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:12,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:12,612 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 15:50:12,795 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,SelfDestructingSolverStorable14 [2022-01-28 15:50:12,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 11 times [2022-01-28 15:50:12,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:12,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783601512] [2022-01-28 15:50:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:12,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:12,849 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 15:50:12,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783601512] [2022-01-28 15:50:12,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783601512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685150752] [2022-01-28 15:50:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:12,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:12,864 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 15:50:12,865 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 15:50:12,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:12,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:13,030 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 15:50:13,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685150752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:13,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:13,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:13,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511790327] [2022-01-28 15:50:13,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:13,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:13,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:13,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:13,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:13,031 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:13,546 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-28 15:50:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:50:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-28 15:50:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:13,554 INFO L225 Difference]: With dead ends: 2268 [2022-01-28 15:50:13,554 INFO L226 Difference]: Without dead ends: 2268 [2022-01-28 15:50:13,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:50:13,555 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 221 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:13,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 195 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-28 15:50:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-28 15:50:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-28 15:50:13,580 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-28 15:50:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:13,580 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-28 15:50:13,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-28 15:50:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:13,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:13,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:13,604 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 15:50:13,797 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,SelfDestructingSolverStorable15 [2022-01-28 15:50:13,798 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 12 times [2022-01-28 15:50:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733628371] [2022-01-28 15:50:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:13,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:13,834 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 15:50:13,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733628371] [2022-01-28 15:50:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733628371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003733235] [2022-01-28 15:50:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:13,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:13,836 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 15:50:13,837 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 15:50:13,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:50:13,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:13,940 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 15:50:13,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003733235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:14,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:14,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:14,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763036977] [2022-01-28 15:50:14,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:14,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:14,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:14,006 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:14,584 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-28 15:50:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:50:14,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-28 15:50:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:14,593 INFO L225 Difference]: With dead ends: 2256 [2022-01-28 15:50:14,593 INFO L226 Difference]: Without dead ends: 2256 [2022-01-28 15:50:14,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:50:14,594 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 273 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:14,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 166 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-28 15:50:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-28 15:50:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 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 15:50:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-28 15:50:14,615 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-28 15:50:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:14,616 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-28 15:50:14,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-28 15:50:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:14,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:14,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:14,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:14,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:14,833 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 13 times [2022-01-28 15:50:14,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:14,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589610942] [2022-01-28 15:50:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:14,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:14,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589610942] [2022-01-28 15:50:14,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589610942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43759113] [2022-01-28 15:50:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:14,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:14,875 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 15:50:14,876 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 15:50:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:14,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:15,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43759113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:15,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:15,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-28 15:50:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710992947] [2022-01-28 15:50:15,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:15,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:50:15,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:50:15,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:50:15,028 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:15,250 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-28 15:50:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:50:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:15,256 INFO L225 Difference]: With dead ends: 1611 [2022-01-28 15:50:15,256 INFO L226 Difference]: Without dead ends: 1611 [2022-01-28 15:50:15,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:50:15,257 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 204 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 129 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-28 15:50:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-28 15:50:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-28 15:50:15,275 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-28 15:50:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-28 15:50:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-28 15:50:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:15,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:15,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:15,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-28 15:50:15,492 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,SelfDestructingSolverStorable17 [2022-01-28 15:50:15,493 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 14 times [2022-01-28 15:50:15,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977518057] [2022-01-28 15:50:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:15,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:15,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977518057] [2022-01-28 15:50:15,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977518057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842140291] [2022-01-28 15:50:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:15,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:15,534 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 15:50:15,535 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 15:50:15,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:15,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:15,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:15,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:15,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842140291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:15,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:15,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:15,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567290343] [2022-01-28 15:50:15,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:15,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:15,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:15,692 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:16,188 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-28 15:50:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:50:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-28 15:50:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:16,197 INFO L225 Difference]: With dead ends: 2408 [2022-01-28 15:50:16,197 INFO L226 Difference]: Without dead ends: 2404 [2022-01-28 15:50:16,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:50:16,198 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 279 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:16,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 144 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:50:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-28 15:50:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-28 15:50:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-28 15:50:16,224 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-28 15:50:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:16,224 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-28 15:50:16,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:50:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-28 15:50:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:16,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:16,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:16,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:16,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:16,439 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 15 times [2022-01-28 15:50:16,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763703251] [2022-01-28 15:50:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:16,471 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 15:50:16,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763703251] [2022-01-28 15:50:16,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763703251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:16,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668148780] [2022-01-28 15:50:16,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:16,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:16,473 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 15:50:16,474 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 15:50:16,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:50:16,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:16,584 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 15:50:16,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:16,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668148780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:16,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:16,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:16,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923394200] [2022-01-28 15:50:16,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:16,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:16,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:16,666 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:17,566 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-28 15:50:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:50:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:17,574 INFO L225 Difference]: With dead ends: 3509 [2022-01-28 15:50:17,574 INFO L226 Difference]: Without dead ends: 3509 [2022-01-28 15:50:17,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-28 15:50:17,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 491 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:17,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 256 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:50:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-28 15:50:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-28 15:50:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-28 15:50:17,628 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-28 15:50:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:17,629 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-28 15:50:17,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-28 15:50:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:17,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:17,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:17,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:17,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:17,848 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 16 times [2022-01-28 15:50:17,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792237318] [2022-01-28 15:50:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:17,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792237318] [2022-01-28 15:50:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792237318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345775059] [2022-01-28 15:50:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:17,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:17,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:17,881 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 15:50:17,882 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 15:50:17,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:17,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345775059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:18,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:18,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399343937] [2022-01-28 15:50:18,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:18,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:18,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:18,068 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:19,280 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-28 15:50:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-28 15:50:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:19,287 INFO L225 Difference]: With dead ends: 3211 [2022-01-28 15:50:19,287 INFO L226 Difference]: Without dead ends: 3207 [2022-01-28 15:50:19,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-28 15:50:19,289 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 472 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 297 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:50:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-28 15:50:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-28 15:50:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-28 15:50:19,319 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-28 15:50:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:19,319 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-28 15:50:19,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-28 15:50:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:19,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:19,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:19,342 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 15:50:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:19,536 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2022-01-28 15:50:19,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510264692] [2022-01-28 15:50:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:19,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:19,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510264692] [2022-01-28 15:50:19,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510264692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430100936] [2022-01-28 15:50:19,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:19,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:19,570 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 15:50:19,573 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 15:50:19,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:50:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:50:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:19,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430100936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:19,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:19,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-28 15:50:19,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394094633] [2022-01-28 15:50:19,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:19,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:50:19,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:50:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:50:19,737 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 15:50:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:19,824 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-28 15:50:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:50:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-01-28 15:50:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:19,826 INFO L225 Difference]: With dead ends: 1333 [2022-01-28 15:50:19,826 INFO L226 Difference]: Without dead ends: 1333 [2022-01-28 15:50:19,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:19,827 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:19,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 77 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-28 15:50:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-28 15:50:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-28 15:50:19,861 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-28 15:50:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:19,861 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-28 15:50:19,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 15:50:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-28 15:50:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:19,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:19,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:19,892 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 15:50:20,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:20,091 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 17 times [2022-01-28 15:50:20,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:20,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038237051] [2022-01-28 15:50:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:20,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:20,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038237051] [2022-01-28 15:50:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038237051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872486085] [2022-01-28 15:50:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:20,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:20,136 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 15:50:20,138 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 15:50:20,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:20,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:20,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:20,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:20,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872486085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:20,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:20,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-28 15:50:20,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270018572] [2022-01-28 15:50:20,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:20,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:50:20,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:50:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:50:20,231 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 15:50:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:20,461 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-28 15:50:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:50:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-28 15:50:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:20,492 INFO L225 Difference]: With dead ends: 2129 [2022-01-28 15:50:20,492 INFO L226 Difference]: Without dead ends: 2129 [2022-01-28 15:50:20,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:50:20,493 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:20,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 123 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-28 15:50:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-28 15:50:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-28 15:50:20,533 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-28 15:50:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-28 15:50:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 15:50:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-28 15:50:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:20,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:20,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:20,553 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 15:50:20,751 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,SelfDestructingSolverStorable22 [2022-01-28 15:50:20,751 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 18 times [2022-01-28 15:50:20,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513798063] [2022-01-28 15:50:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:20,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:20,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:20,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513798063] [2022-01-28 15:50:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513798063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:20,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834685573] [2022-01-28 15:50:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:20,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:20,783 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 15:50:20,784 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 15:50:20,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:20,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:20,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:20,885 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 15:50:20,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834685573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:20,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:20,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-28 15:50:20,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272141960] [2022-01-28 15:50:20,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:20,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:50:20,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:50:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:50:20,900 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 15:50:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:21,140 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-28 15:50:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 15:50:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-28 15:50:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:21,160 INFO L225 Difference]: With dead ends: 2262 [2022-01-28 15:50:21,160 INFO L226 Difference]: Without dead ends: 2262 [2022-01-28 15:50:21,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:50:21,161 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 192 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:21,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 113 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-28 15:50:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-28 15:50:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-28 15:50:21,197 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-28 15:50:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:21,197 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-28 15:50:21,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 15:50:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-28 15:50:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:21,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:21,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:21,215 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 15:50:21,417 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,SelfDestructingSolverStorable23 [2022-01-28 15:50:21,417 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash 215632942, now seen corresponding path program 19 times [2022-01-28 15:50:21,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147815702] [2022-01-28 15:50:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:21,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:21,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147815702] [2022-01-28 15:50:21,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147815702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513569996] [2022-01-28 15:50:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:21,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:21,467 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 15:50:21,468 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 15:50:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:21,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:21,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513569996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:21,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:21,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-28 15:50:21,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566036307] [2022-01-28 15:50:21,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:21,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:50:21,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:50:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:21,618 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 15:50:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:21,856 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-28 15:50:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:50:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-28 15:50:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:21,860 INFO L225 Difference]: With dead ends: 1474 [2022-01-28 15:50:21,860 INFO L226 Difference]: Without dead ends: 1464 [2022-01-28 15:50:21,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:50:21,861 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:21,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 133 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-28 15:50:21,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-28 15:50:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-28 15:50:21,885 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-28 15:50:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:21,886 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-28 15:50:21,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 15:50:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-28 15:50:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:21,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:21,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:21,905 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 15:50:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:22,103 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 20 times [2022-01-28 15:50:22,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073203106] [2022-01-28 15:50:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:22,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:22,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073203106] [2022-01-28 15:50:22,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073203106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164059064] [2022-01-28 15:50:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:22,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:22,136 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 15:50:22,140 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 15:50:22,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:22,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164059064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:22,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:22,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-28 15:50:22,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794267653] [2022-01-28 15:50:22,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:22,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:50:22,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:50:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:50:22,277 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 15:50:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:22,552 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-28 15:50:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:50:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-28 15:50:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:22,556 INFO L225 Difference]: With dead ends: 2318 [2022-01-28 15:50:22,556 INFO L226 Difference]: Without dead ends: 2314 [2022-01-28 15:50:22,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:50:22,557 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:22,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 122 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-28 15:50:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-28 15:50:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-28 15:50:22,579 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-28 15:50:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:22,579 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-28 15:50:22,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 15:50:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-28 15:50:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:22,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:22,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:22,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:22,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:22,795 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:22,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 21 times [2022-01-28 15:50:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:22,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405279180] [2022-01-28 15:50:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:22,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:22,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:22,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405279180] [2022-01-28 15:50:22,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405279180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:22,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035571699] [2022-01-28 15:50:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:22,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:22,830 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 15:50:22,831 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 15:50:22,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:50:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:22,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035571699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:22,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:22,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-28 15:50:22,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208213658] [2022-01-28 15:50:22,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:22,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:50:22,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:50:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:50:22,970 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 15:50:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:23,261 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-28 15:50:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:50:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-28 15:50:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:23,265 INFO L225 Difference]: With dead ends: 2302 [2022-01-28 15:50:23,265 INFO L226 Difference]: Without dead ends: 2290 [2022-01-28 15:50:23,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:23,266 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 234 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:23,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 118 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:50:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-28 15:50:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-28 15:50:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-28 15:50:23,313 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-28 15:50:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:23,313 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-28 15:50:23,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 15:50:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-28 15:50:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:23,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:23,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:23,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:23,519 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,SelfDestructingSolverStorable26 [2022-01-28 15:50:23,519 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 22 times [2022-01-28 15:50:23,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:23,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95223074] [2022-01-28 15:50:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:23,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:23,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95223074] [2022-01-28 15:50:23,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95223074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887562895] [2022-01-28 15:50:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:23,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:23,554 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 15:50:23,555 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 15:50:23,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:23,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:23,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887562895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:23,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:23,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463811903] [2022-01-28 15:50:23,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:23,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:23,692 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:24,336 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-28 15:50:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-28 15:50:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:24,345 INFO L225 Difference]: With dead ends: 4760 [2022-01-28 15:50:24,345 INFO L226 Difference]: Without dead ends: 4760 [2022-01-28 15:50:24,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:50:24,347 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 448 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:24,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 216 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-28 15:50:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-28 15:50:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-28 15:50:24,388 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-28 15:50:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:24,389 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-28 15:50:24,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-28 15:50:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:24,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:24,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:24,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:24,606 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,SelfDestructingSolverStorable27 [2022-01-28 15:50:24,607 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 23 times [2022-01-28 15:50:24,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279570674] [2022-01-28 15:50:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:24,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:24,642 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 15:50:24,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279570674] [2022-01-28 15:50:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279570674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276010] [2022-01-28 15:50:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:24,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:24,644 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 15:50:24,645 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 15:50:24,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:24,798 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 15:50:24,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:24,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:24,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:24,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:24,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771325975] [2022-01-28 15:50:24,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:24,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:24,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:24,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:24,883 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:25,611 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-28 15:50:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:50:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:25,620 INFO L225 Difference]: With dead ends: 4260 [2022-01-28 15:50:25,620 INFO L226 Difference]: Without dead ends: 4260 [2022-01-28 15:50:25,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 15:50:25,627 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 364 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:25,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 203 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-28 15:50:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-28 15:50:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-28 15:50:25,682 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-28 15:50:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:25,683 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-28 15:50:25,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-28 15:50:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:25,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:25,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:25,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:25,891 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,SelfDestructingSolverStorable28 [2022-01-28 15:50:25,892 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 24 times [2022-01-28 15:50:25,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371749312] [2022-01-28 15:50:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:25,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:25,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:25,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371749312] [2022-01-28 15:50:25,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371749312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158224175] [2022-01-28 15:50:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:25,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:25,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:25,944 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 15:50:25,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:25,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:25,967 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 15:50:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:26,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:26,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158224175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:26,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:26,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-28 15:50:26,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039047722] [2022-01-28 15:50:26,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:26,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:50:26,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:50:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:50:26,059 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:26,637 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-28 15:50:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:50:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:26,644 INFO L225 Difference]: With dead ends: 4602 [2022-01-28 15:50:26,645 INFO L226 Difference]: Without dead ends: 4602 [2022-01-28 15:50:26,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:50:26,646 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 349 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:26,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 180 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-28 15:50:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-28 15:50:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-28 15:50:26,683 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-28 15:50:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:26,683 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-28 15:50:26,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-28 15:50:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:26,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:26,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:26,725 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 15:50:26,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:26,901 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 25 times [2022-01-28 15:50:26,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:26,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373939753] [2022-01-28 15:50:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:26,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:26,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373939753] [2022-01-28 15:50:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373939753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230344387] [2022-01-28 15:50:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:26,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:26,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:26,932 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 15:50:26,932 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 15:50:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:27,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:27,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230344387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:27,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:27,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-28 15:50:27,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571695103] [2022-01-28 15:50:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:50:27,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:50:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:50:27,052 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:27,654 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-28 15:50:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 15:50:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:27,662 INFO L225 Difference]: With dead ends: 4348 [2022-01-28 15:50:27,662 INFO L226 Difference]: Without dead ends: 4344 [2022-01-28 15:50:27,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 15:50:27,664 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 403 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:27,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 182 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-28 15:50:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-28 15:50:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-28 15:50:27,749 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-28 15:50:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:27,749 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-28 15:50:27,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-28 15:50:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:27,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:27,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:27,770 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 15:50:27,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:27,969 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 26 times [2022-01-28 15:50:27,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164786691] [2022-01-28 15:50:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:27,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:27,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164786691] [2022-01-28 15:50:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164786691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48369943] [2022-01-28 15:50:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:27,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:27,999 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 15:50:27,999 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 15:50:28,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:28,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:28,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48369943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:28,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:28,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:28,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485647563] [2022-01-28 15:50:28,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:28,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:28,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:28,138 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:28,678 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-28 15:50:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 15:50:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:28,685 INFO L225 Difference]: With dead ends: 4035 [2022-01-28 15:50:28,686 INFO L226 Difference]: Without dead ends: 4035 [2022-01-28 15:50:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 15:50:28,686 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 365 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 253 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-28 15:50:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-28 15:50:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-28 15:50:28,722 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-28 15:50:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-28 15:50:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-28 15:50:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:28,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:28,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:28,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:28,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:28,940 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 27 times [2022-01-28 15:50:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050458938] [2022-01-28 15:50:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:28,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:28,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050458938] [2022-01-28 15:50:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050458938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:28,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428415973] [2022-01-28 15:50:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:28,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:28,995 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 15:50:29,007 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 15:50:29,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:50:29,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:29,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:50:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428415973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:29,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:50:29,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109329495] [2022-01-28 15:50:29,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:29,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:50:29,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:50:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:50:29,187 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:29,951 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-28 15:50:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:50:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:29,958 INFO L225 Difference]: With dead ends: 3794 [2022-01-28 15:50:29,959 INFO L226 Difference]: Without dead ends: 3790 [2022-01-28 15:50:29,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 15:50:29,960 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 422 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:29,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 178 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-28 15:50:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-28 15:50:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-28 15:50:29,993 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-28 15:50:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:29,993 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-28 15:50:29,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-28 15:50:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:29,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:29,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:30,013 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 15:50:30,203 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,SelfDestructingSolverStorable32 [2022-01-28 15:50:30,204 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 28 times [2022-01-28 15:50:30,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:30,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90598974] [2022-01-28 15:50:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:30,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:30,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90598974] [2022-01-28 15:50:30,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90598974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887222461] [2022-01-28 15:50:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:30,254 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 15:50:30,255 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 15:50:30,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:30,337 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 15:50:30,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887222461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:30,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:30,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:30,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707479337] [2022-01-28 15:50:30,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:30,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:30,399 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:31,018 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-28 15:50:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:50:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:31,053 INFO L225 Difference]: With dead ends: 3978 [2022-01-28 15:50:31,054 INFO L226 Difference]: Without dead ends: 3978 [2022-01-28 15:50:31,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 15:50:31,056 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 280 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:31,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 173 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-28 15:50:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-28 15:50:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-28 15:50:31,090 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-28 15:50:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-28 15:50:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-28 15:50:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:31,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:31,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:31,109 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 15:50:31,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:31,306 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 29 times [2022-01-28 15:50:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184182125] [2022-01-28 15:50:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:31,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:31,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184182125] [2022-01-28 15:50:31,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184182125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:31,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325031881] [2022-01-28 15:50:31,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:31,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:31,372 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 15:50:31,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:31,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:31,399 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 15:50:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325031881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:31,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:31,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:31,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945874128] [2022-01-28 15:50:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:31,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:31,529 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:31,956 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-28 15:50:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 15:50:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:31,962 INFO L225 Difference]: With dead ends: 3706 [2022-01-28 15:50:31,962 INFO L226 Difference]: Without dead ends: 3702 [2022-01-28 15:50:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:50:31,963 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 277 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 134 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:50:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-28 15:50:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-28 15:50:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-28 15:50:31,998 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-28 15:50:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:31,999 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-28 15:50:31,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-28 15:50:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:32,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:32,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:32,017 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 15:50:32,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:32,217 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 30 times [2022-01-28 15:50:32,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697289141] [2022-01-28 15:50:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:32,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:32,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:32,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697289141] [2022-01-28 15:50:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697289141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:32,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912582398] [2022-01-28 15:50:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:32,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:32,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:32,257 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 15:50:32,258 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 15:50:32,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:32,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912582398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:32,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:32,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:50:32,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905316717] [2022-01-28 15:50:32,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:32,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:50:32,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:50:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:50:32,432 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:32,898 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-28 15:50:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 15:50:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:32,905 INFO L225 Difference]: With dead ends: 4114 [2022-01-28 15:50:32,905 INFO L226 Difference]: Without dead ends: 4102 [2022-01-28 15:50:32,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 15:50:32,906 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 246 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:32,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 198 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:50:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-28 15:50:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-28 15:50:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-28 15:50:32,947 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-28 15:50:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:32,947 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-28 15:50:32,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-28 15:50:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:32,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:32,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:32,980 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 15:50:33,165 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,SelfDestructingSolverStorable35 [2022-01-28 15:50:33,166 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 31 times [2022-01-28 15:50:33,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929389452] [2022-01-28 15:50:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:33,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:33,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929389452] [2022-01-28 15:50:33,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929389452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944234590] [2022-01-28 15:50:33,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:33,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:33,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:33,206 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 15:50:33,207 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 15:50:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:33,275 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 15:50:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:33,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944234590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:33,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:33,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:50:33,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808846997] [2022-01-28 15:50:33,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:33,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:33,327 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:33,880 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-28 15:50:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 15:50:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:33,887 INFO L225 Difference]: With dead ends: 3694 [2022-01-28 15:50:33,887 INFO L226 Difference]: Without dead ends: 3694 [2022-01-28 15:50:33,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 15:50:33,888 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 330 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:33,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 306 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-28 15:50:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-28 15:50:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-28 15:50:33,936 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-28 15:50:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-28 15:50:33,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-28 15:50:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:33,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:33,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:33,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:34,155 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,SelfDestructingSolverStorable36 [2022-01-28 15:50:34,155 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 32 times [2022-01-28 15:50:34,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:34,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831745011] [2022-01-28 15:50:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:34,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:34,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831745011] [2022-01-28 15:50:34,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831745011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:34,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627310706] [2022-01-28 15:50:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:34,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:34,192 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 15:50:34,193 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 15:50:34,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:34,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:34,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627310706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:34,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:34,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:50:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075364303] [2022-01-28 15:50:34,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:34,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:50:34,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:50:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:50:34,375 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:35,108 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-28 15:50:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:50:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:35,115 INFO L225 Difference]: With dead ends: 3420 [2022-01-28 15:50:35,115 INFO L226 Difference]: Without dead ends: 3416 [2022-01-28 15:50:35,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:50:35,116 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 322 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:35,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 255 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:50:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-28 15:50:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-28 15:50:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-28 15:50:35,150 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-28 15:50:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:35,150 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-28 15:50:35,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-28 15:50:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:50:35,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:35,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:35,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:35,361 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,SelfDestructingSolverStorable37 [2022-01-28 15:50:35,362 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 33 times [2022-01-28 15:50:35,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942271769] [2022-01-28 15:50:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:35,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:35,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942271769] [2022-01-28 15:50:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942271769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390478640] [2022-01-28 15:50:35,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:35,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:35,420 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 15:50:35,421 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 15:50:35,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:50:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:50:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:35,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:35,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390478640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:35,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:35,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:50:35,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776610998] [2022-01-28 15:50:35,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:35,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:50:35,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:50:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:50:35,534 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:35,942 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-28 15:50:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 15:50:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:50:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:35,948 INFO L225 Difference]: With dead ends: 3256 [2022-01-28 15:50:35,948 INFO L226 Difference]: Without dead ends: 3244 [2022-01-28 15:50:35,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 15:50:35,950 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 229 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:35,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 199 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:50:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-28 15:50:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-28 15:50:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-28 15:50:35,991 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-28 15:50:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:35,992 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-28 15:50:35,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-28 15:50:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:50:35,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:35,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:36,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-28 15:50:36,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-28 15:50:36,211 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2022-01-28 15:50:36,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332790631] [2022-01-28 15:50:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:36,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:36,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332790631] [2022-01-28 15:50:36,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332790631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019995184] [2022-01-28 15:50:36,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:36,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:36,574 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 15:50:36,574 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 15:50:36,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:50:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:37,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:37,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:50:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:37,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:37,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:37,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:37,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 153 [2022-01-28 15:50:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019995184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:39,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:39,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:50:39,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043093639] [2022-01-28 15:50:39,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:39,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:50:39,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:50:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:50:39,186 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:43,278 INFO L93 Difference]: Finished difference Result 4082 states and 13028 transitions. [2022-01-28 15:50:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:50:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:50:43,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:43,286 INFO L225 Difference]: With dead ends: 4082 [2022-01-28 15:50:43,286 INFO L226 Difference]: Without dead ends: 4022 [2022-01-28 15:50:43,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:50:43,287 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 624 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:43,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 277 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:50:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-01-28 15:50:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 1792. [2022-01-28 15:50:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-28 15:50:43,324 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-28 15:50:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:43,324 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-28 15:50:43,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-28 15:50:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:50:43,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:43,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:43,342 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 15:50:43,541 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,SelfDestructingSolverStorable39 [2022-01-28 15:50:43,541 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2022-01-28 15:50:43,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:43,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438697207] [2022-01-28 15:50:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:43,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:43,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438697207] [2022-01-28 15:50:43,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438697207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:43,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397622029] [2022-01-28 15:50:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:43,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:43,984 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 15:50:43,985 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 15:50:44,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:50:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:44,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:50:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:44,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:45,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:45,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:50:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397622029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:46,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:50:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391526760] [2022-01-28 15:50:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:46,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:50:46,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:50:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:50:46,656 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:51,114 INFO L93 Difference]: Finished difference Result 4130 states and 13228 transitions. [2022-01-28 15:50:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:50:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:50:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:51,122 INFO L225 Difference]: With dead ends: 4130 [2022-01-28 15:50:51,122 INFO L226 Difference]: Without dead ends: 4100 [2022-01-28 15:50:51,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=978, Invalid=4278, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 15:50:51,123 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 482 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:51,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 352 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1325 Invalid, 0 Unknown, 19 Unchecked, 0.8s Time] [2022-01-28 15:50:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-01-28 15:50:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 1821. [2022-01-28 15:50:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 3.5835164835164837) internal successors, (6522), 1820 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6522 transitions. [2022-01-28 15:50:51,164 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6522 transitions. Word has length 26 [2022-01-28 15:50:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:51,164 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 6522 transitions. [2022-01-28 15:50:51,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6522 transitions. [2022-01-28 15:50:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:50:51,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:51,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:51,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:51,383 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,SelfDestructingSolverStorable40 [2022-01-28 15:50:51,383 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1106289214, now seen corresponding path program 6 times [2022-01-28 15:50:51,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:51,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797823859] [2022-01-28 15:50:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:51,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:51,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797823859] [2022-01-28 15:50:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797823859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254048733] [2022-01-28 15:50:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:51,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:51,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:51,764 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 15:50:51,765 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 15:50:51,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:50:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:52,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:52,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:50:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:52,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:53,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:53,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:53,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 141 [2022-01-28 15:50:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:54,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254048733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:54,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:50:54,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864469757] [2022-01-28 15:50:54,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:50:54,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:50:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:50:54,013 INFO L87 Difference]: Start difference. First operand 1821 states and 6522 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:02,801 INFO L93 Difference]: Finished difference Result 4374 states and 14315 transitions. [2022-01-28 15:51:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 15:51:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:02,809 INFO L225 Difference]: With dead ends: 4374 [2022-01-28 15:51:02,809 INFO L226 Difference]: Without dead ends: 4329 [2022-01-28 15:51:02,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1494, Invalid=8606, Unknown=0, NotChecked=0, Total=10100 [2022-01-28 15:51:02,811 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 553 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:02,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 610 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2085 Invalid, 0 Unknown, 422 Unchecked, 1.2s Time] [2022-01-28 15:51:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2022-01-28 15:51:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 1894. [2022-01-28 15:51:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 3.5879556259904914) internal successors, (6792), 1893 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 6792 transitions. [2022-01-28 15:51:02,853 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 6792 transitions. Word has length 26 [2022-01-28 15:51:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:02,853 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 6792 transitions. [2022-01-28 15:51:02,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 6792 transitions. [2022-01-28 15:51:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:02,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:02,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:02,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-28 15:51:03,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-28 15:51:03,079 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 34 times [2022-01-28 15:51:03,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:03,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647156385] [2022-01-28 15:51:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:03,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:03,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647156385] [2022-01-28 15:51:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647156385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390198341] [2022-01-28 15:51:03,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:51:03,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:03,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:03,530 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 15:51:03,531 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 15:51:03,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:51:03,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:51:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:04,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:04,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:04,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 15:51:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:04,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:04,721 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:51:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 141 [2022-01-28 15:51:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:05,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390198341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:05,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:05,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-28 15:51:05,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003110270] [2022-01-28 15:51:05,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:05,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:51:05,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:51:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:51:05,158 INFO L87 Difference]: Start difference. First operand 1894 states and 6792 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:10,644 INFO L93 Difference]: Finished difference Result 3953 states and 13245 transitions. [2022-01-28 15:51:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:51:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:10,651 INFO L225 Difference]: With dead ends: 3953 [2022-01-28 15:51:10,651 INFO L226 Difference]: Without dead ends: 3923 [2022-01-28 15:51:10,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1171, Invalid=7019, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:51:10,654 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 331 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:10,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 394 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:51:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-01-28 15:51:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 1967. [2022-01-28 15:51:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.582909460834181) internal successors, (7044), 1966 states have internal predecessors, (7044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 7044 transitions. [2022-01-28 15:51:10,693 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 7044 transitions. Word has length 26 [2022-01-28 15:51:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:10,693 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 7044 transitions. [2022-01-28 15:51:10,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 7044 transitions. [2022-01-28 15:51:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:10,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:10,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:10,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-28 15:51:10,911 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,SelfDestructingSolverStorable42 [2022-01-28 15:51:10,912 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 7 times [2022-01-28 15:51:10,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032615805] [2022-01-28 15:51:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:10,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:11,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:11,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032615805] [2022-01-28 15:51:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032615805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225869835] [2022-01-28 15:51:11,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:51:11,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:11,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:11,185 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 15:51:11,185 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 15:51:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:51:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:11,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:51:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:11,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:12,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:12,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:12,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:51:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225869835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:14,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:14,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:51:14,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131526958] [2022-01-28 15:51:14,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:14,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:51:14,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:51:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:51:14,416 INFO L87 Difference]: Start difference. First operand 1967 states and 7044 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:18,802 INFO L93 Difference]: Finished difference Result 4731 states and 14866 transitions. [2022-01-28 15:51:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:51:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:18,811 INFO L225 Difference]: With dead ends: 4731 [2022-01-28 15:51:18,811 INFO L226 Difference]: Without dead ends: 4701 [2022-01-28 15:51:18,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1110, Invalid=4742, Unknown=0, NotChecked=0, Total=5852 [2022-01-28 15:51:18,812 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 669 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:18,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 436 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1679 Invalid, 0 Unknown, 93 Unchecked, 0.9s Time] [2022-01-28 15:51:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2022-01-28 15:51:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 1990. [2022-01-28 15:51:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.575666163901458) internal successors, (7112), 1989 states have internal predecessors, (7112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7112 transitions. [2022-01-28 15:51:18,874 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7112 transitions. Word has length 26 [2022-01-28 15:51:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:18,874 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7112 transitions. [2022-01-28 15:51:18,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7112 transitions. [2022-01-28 15:51:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:18,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:18,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:18,915 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 15:51:19,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:19,091 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 35 times [2022-01-28 15:51:19,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:19,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497045097] [2022-01-28 15:51:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:19,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:19,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497045097] [2022-01-28 15:51:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497045097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873609447] [2022-01-28 15:51:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:51:19,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:19,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:19,452 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 15:51:19,454 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 15:51:19,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:51:19,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:51:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:20,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:20,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:20,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 15:51:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:20,676 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:51:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 141 [2022-01-28 15:51:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873609447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:21,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 15:51:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731083294] [2022-01-28 15:51:21,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:21,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:51:21,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:51:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:51:21,175 INFO L87 Difference]: Start difference. First operand 1990 states and 7112 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:29,160 INFO L93 Difference]: Finished difference Result 5039 states and 16419 transitions. [2022-01-28 15:51:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-28 15:51:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:29,169 INFO L225 Difference]: With dead ends: 5039 [2022-01-28 15:51:29,169 INFO L226 Difference]: Without dead ends: 4977 [2022-01-28 15:51:29,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2152, Invalid=11420, Unknown=0, NotChecked=0, Total=13572 [2022-01-28 15:51:29,171 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 459 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:29,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 590 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 15:51:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-01-28 15:51:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 2032. [2022-01-28 15:51:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.5770556376169376) internal successors, (7265), 2031 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7265 transitions. [2022-01-28 15:51:29,217 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7265 transitions. Word has length 26 [2022-01-28 15:51:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7265 transitions. [2022-01-28 15:51:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7265 transitions. [2022-01-28 15:51:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:29,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:29,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:29,239 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 15:51:29,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:29,437 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 36 times [2022-01-28 15:51:29,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705949131] [2022-01-28 15:51:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:29,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:29,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:29,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705949131] [2022-01-28 15:51:29,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705949131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:29,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305500666] [2022-01-28 15:51:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:51:29,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:29,789 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 15:51:29,791 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 15:51:29,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:51:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:51:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:30,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:30,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:30,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 15:51:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:30,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:30,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:30,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:30,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:30,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 135 [2022-01-28 15:51:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305500666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:30,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:30,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-28 15:51:30,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180864551] [2022-01-28 15:51:30,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:30,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:51:30,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:51:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:51:30,800 INFO L87 Difference]: Start difference. First operand 2032 states and 7265 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:36,459 INFO L93 Difference]: Finished difference Result 4720 states and 15024 transitions. [2022-01-28 15:51:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:51:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:36,468 INFO L225 Difference]: With dead ends: 4720 [2022-01-28 15:51:36,468 INFO L226 Difference]: Without dead ends: 4675 [2022-01-28 15:51:36,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1182, Invalid=5958, Unknown=0, NotChecked=0, Total=7140 [2022-01-28 15:51:36,470 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 679 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:36,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 526 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:51:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-01-28 15:51:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 2289. [2022-01-28 15:51:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.541520979020979) internal successors, (8103), 2288 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 8103 transitions. [2022-01-28 15:51:36,521 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 8103 transitions. Word has length 26 [2022-01-28 15:51:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 8103 transitions. [2022-01-28 15:51:36,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 8103 transitions. [2022-01-28 15:51:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:36,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:36,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:36,544 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 15:51:36,739 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,SelfDestructingSolverStorable45 [2022-01-28 15:51:36,740 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 296771640, now seen corresponding path program 8 times [2022-01-28 15:51:36,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:36,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34555776] [2022-01-28 15:51:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:36,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:37,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34555776] [2022-01-28 15:51:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34555776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460203238] [2022-01-28 15:51:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:51:37,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:37,132 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 15:51:37,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:51:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:37,154 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 15:51:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:51:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:38,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:51:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:39,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:40,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:40,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 137 [2022-01-28 15:51:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:40,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460203238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:40,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:40,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:51:40,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247315967] [2022-01-28 15:51:40,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:51:40,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:51:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:51:40,771 INFO L87 Difference]: Start difference. First operand 2289 states and 8103 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:58,795 INFO L93 Difference]: Finished difference Result 8367 states and 27884 transitions. [2022-01-28 15:51:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-28 15:51:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:51:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:58,814 INFO L225 Difference]: With dead ends: 8367 [2022-01-28 15:51:58,814 INFO L226 Difference]: Without dead ends: 8346 [2022-01-28 15:51:58,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18689 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=4968, Invalid=40188, Unknown=0, NotChecked=0, Total=45156 [2022-01-28 15:51:58,816 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 682 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 3871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1361 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:58,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1026 Invalid, 3871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2393 Invalid, 0 Unknown, 1361 Unchecked, 1.5s Time] [2022-01-28 15:51:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2022-01-28 15:51:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 2380. [2022-01-28 15:51:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 3.5443463640184953) internal successors, (8432), 2379 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 8432 transitions. [2022-01-28 15:51:58,895 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 8432 transitions. Word has length 26 [2022-01-28 15:51:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:58,895 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 8432 transitions. [2022-01-28 15:51:58,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 8432 transitions. [2022-01-28 15:51:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:51:58,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:58,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:58,917 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 15:51:59,115 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,SelfDestructingSolverStorable46 [2022-01-28 15:51:59,115 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 9 times [2022-01-28 15:51:59,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431750643] [2022-01-28 15:51:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:59,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:59,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431750643] [2022-01-28 15:51:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431750643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326282921] [2022-01-28 15:51:59,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:51:59,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:59,495 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 15:51:59,498 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 15:51:59,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:51:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:51:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:59,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:52:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:00,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:00,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:00,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:52:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:02,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326282921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:02,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:02,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:52:02,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519844079] [2022-01-28 15:52:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:02,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:52:02,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:52:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:52:02,418 INFO L87 Difference]: Start difference. First operand 2380 states and 8432 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:06,641 INFO L93 Difference]: Finished difference Result 4987 states and 16070 transitions. [2022-01-28 15:52:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:52:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:06,650 INFO L225 Difference]: With dead ends: 4987 [2022-01-28 15:52:06,650 INFO L226 Difference]: Without dead ends: 4957 [2022-01-28 15:52:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=967, Invalid=4145, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 15:52:06,651 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 561 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:06,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 385 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1469 Invalid, 0 Unknown, 97 Unchecked, 0.8s Time] [2022-01-28 15:52:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-01-28 15:52:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 2416. [2022-01-28 15:52:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 3.5391304347826087) internal successors, (8547), 2415 states have internal predecessors, (8547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 8547 transitions. [2022-01-28 15:52:06,697 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 8547 transitions. Word has length 26 [2022-01-28 15:52:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:06,697 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 8547 transitions. [2022-01-28 15:52:06,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 8547 transitions. [2022-01-28 15:52:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:06,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:06,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:06,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-28 15:52:06,917 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,SelfDestructingSolverStorable47 [2022-01-28 15:52:06,917 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1340800816, now seen corresponding path program 10 times [2022-01-28 15:52:06,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551743337] [2022-01-28 15:52:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:06,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:07,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551743337] [2022-01-28 15:52:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551743337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:07,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422871085] [2022-01-28 15:52:07,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:52:07,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:07,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:07,248 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 15:52:07,249 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 15:52:07,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:52:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:52:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:52:07,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:07,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:52:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:07,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:08,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:08,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:08,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-28 15:52:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422871085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:09,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:52:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722406306] [2022-01-28 15:52:09,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:52:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:52:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:52:09,998 INFO L87 Difference]: Start difference. First operand 2416 states and 8547 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:14,375 INFO L93 Difference]: Finished difference Result 5075 states and 16223 transitions. [2022-01-28 15:52:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:52:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:14,384 INFO L225 Difference]: With dead ends: 5075 [2022-01-28 15:52:14,385 INFO L226 Difference]: Without dead ends: 5030 [2022-01-28 15:52:14,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=986, Invalid=3984, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 15:52:14,385 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 470 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:14,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 346 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:52:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2022-01-28 15:52:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 2383. [2022-01-28 15:52:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 3.549538203190596) internal successors, (8455), 2382 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 8455 transitions. [2022-01-28 15:52:14,438 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 8455 transitions. Word has length 26 [2022-01-28 15:52:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 2383 states and 8455 transitions. [2022-01-28 15:52:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 8455 transitions. [2022-01-28 15:52:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:14,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:14,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:14,457 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 15:52:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:14,643 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 11 times [2022-01-28 15:52:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102807403] [2022-01-28 15:52:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:14,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:14,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102807403] [2022-01-28 15:52:14,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102807403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:14,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726032421] [2022-01-28 15:52:14,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:52:14,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:14,881 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 15:52:14,882 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 15:52:14,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:52:14,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:52:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:52:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:15,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 78 [2022-01-28 15:52:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:16,051 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:52:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:52:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726032421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:17,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:17,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:52:17,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868081840] [2022-01-28 15:52:17,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:52:17,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:52:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:52:17,272 INFO L87 Difference]: Start difference. First operand 2383 states and 8455 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:25,140 INFO L93 Difference]: Finished difference Result 5498 states and 17769 transitions. [2022-01-28 15:52:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-28 15:52:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:25,151 INFO L225 Difference]: With dead ends: 5498 [2022-01-28 15:52:25,151 INFO L226 Difference]: Without dead ends: 5411 [2022-01-28 15:52:25,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1663, Invalid=10547, Unknown=0, NotChecked=0, Total=12210 [2022-01-28 15:52:25,152 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 528 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:25,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 576 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 15:52:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2022-01-28 15:52:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 2427. [2022-01-28 15:52:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 3.5519373454245673) internal successors, (8617), 2426 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 8617 transitions. [2022-01-28 15:52:25,209 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 8617 transitions. Word has length 26 [2022-01-28 15:52:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:25,209 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 8617 transitions. [2022-01-28 15:52:25,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 8617 transitions. [2022-01-28 15:52:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:25,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:25,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:25,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-28 15:52:25,427 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,SelfDestructingSolverStorable49 [2022-01-28 15:52:25,427 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 12 times [2022-01-28 15:52:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85194563] [2022-01-28 15:52:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:25,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:25,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:25,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85194563] [2022-01-28 15:52:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85194563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:25,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812662158] [2022-01-28 15:52:25,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:52:25,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:25,836 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 15:52:25,837 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 15:52:25,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:52:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:52:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:52:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:26,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:26,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:52:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:26,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:27,061 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:52:27,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:52:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812662158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:28,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:28,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:52:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572570888] [2022-01-28 15:52:28,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:52:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:52:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:52:28,204 INFO L87 Difference]: Start difference. First operand 2427 states and 8617 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:34,316 INFO L93 Difference]: Finished difference Result 5109 states and 16642 transitions. [2022-01-28 15:52:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-28 15:52:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:34,326 INFO L225 Difference]: With dead ends: 5109 [2022-01-28 15:52:34,326 INFO L226 Difference]: Without dead ends: 5064 [2022-01-28 15:52:34,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1180, Invalid=7010, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:52:34,327 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 394 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:34,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 572 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:52:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2022-01-28 15:52:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 2434. [2022-01-28 15:52:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 3.553226469379367) internal successors, (8645), 2433 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 8645 transitions. [2022-01-28 15:52:34,378 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 8645 transitions. Word has length 26 [2022-01-28 15:52:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:34,378 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 8645 transitions. [2022-01-28 15:52:34,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 8645 transitions. [2022-01-28 15:52:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:34,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:34,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:34,398 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 15:52:34,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:34,584 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -235126068, now seen corresponding path program 13 times [2022-01-28 15:52:34,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:34,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825672628] [2022-01-28 15:52:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:34,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:34,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825672628] [2022-01-28 15:52:34,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825672628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335297587] [2022-01-28 15:52:34,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:52:34,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:34,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:34,975 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 15:52:34,975 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 15:52:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:52:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:35,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:52:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:35,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:36,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:36,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:52:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335297587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:37,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:52:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877059371] [2022-01-28 15:52:37,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:52:37,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:52:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:52:37,435 INFO L87 Difference]: Start difference. First operand 2434 states and 8645 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:43,791 INFO L93 Difference]: Finished difference Result 6831 states and 21319 transitions. [2022-01-28 15:52:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:52:43,791 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:43,804 INFO L225 Difference]: With dead ends: 6831 [2022-01-28 15:52:43,804 INFO L226 Difference]: Without dead ends: 6801 [2022-01-28 15:52:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1592, Invalid=6064, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 15:52:43,805 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 715 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:43,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 462 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1552 Invalid, 0 Unknown, 118 Unchecked, 1.1s Time] [2022-01-28 15:52:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2022-01-28 15:52:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 2530. [2022-01-28 15:52:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.574535389482009) internal successors, (9040), 2529 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9040 transitions. [2022-01-28 15:52:43,872 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9040 transitions. Word has length 26 [2022-01-28 15:52:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:43,872 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 9040 transitions. [2022-01-28 15:52:43,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9040 transitions. [2022-01-28 15:52:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:43,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:43,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:43,892 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 15:52:44,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-28 15:52:44,092 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1729033790, now seen corresponding path program 14 times [2022-01-28 15:52:44,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:44,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518004933] [2022-01-28 15:52:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:44,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:44,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518004933] [2022-01-28 15:52:44,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518004933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968120033] [2022-01-28 15:52:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:52:44,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:44,504 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 15:52:44,505 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 15:52:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:52:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:52:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:52:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:45,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:45,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:52:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:45,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:45,981 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:52:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:52:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968120033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:47,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:47,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:52:47,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849124814] [2022-01-28 15:52:47,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:52:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:52:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:52:47,833 INFO L87 Difference]: Start difference. First operand 2530 states and 9040 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:52:56,284 INFO L93 Difference]: Finished difference Result 5934 states and 19102 transitions. [2022-01-28 15:52:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 15:52:56,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:52:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:52:56,295 INFO L225 Difference]: With dead ends: 5934 [2022-01-28 15:52:56,295 INFO L226 Difference]: Without dead ends: 5889 [2022-01-28 15:52:56,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1579, Invalid=9341, Unknown=0, NotChecked=0, Total=10920 [2022-01-28 15:52:56,296 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 658 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:52:56,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 558 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:52:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2022-01-28 15:52:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 2514. [2022-01-28 15:52:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2514 states, 2513 states have (on average 3.57699960206924) internal successors, (8989), 2513 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 8989 transitions. [2022-01-28 15:52:56,353 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 8989 transitions. Word has length 26 [2022-01-28 15:52:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:52:56,354 INFO L470 AbstractCegarLoop]: Abstraction has 2514 states and 8989 transitions. [2022-01-28 15:52:56,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:52:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 8989 transitions. [2022-01-28 15:52:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:52:56,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:52:56,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:52:56,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 15:52:56,563 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,SelfDestructingSolverStorable52 [2022-01-28 15:52:56,563 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:52:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:52:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 37 times [2022-01-28 15:52:56,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:52:56,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190568090] [2022-01-28 15:52:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:52:56,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:52:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:56,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:52:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190568090] [2022-01-28 15:52:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190568090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:52:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720986609] [2022-01-28 15:52:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:52:56,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:52:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:52:56,916 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 15:52:56,917 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 15:52:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:52:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:52:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:52:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:52:57,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:57,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 15:52:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:57,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:52:57,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:57,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:57,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:52:57,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:52:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 135 [2022-01-28 15:52:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:52:58,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720986609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:52:58,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:52:58,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-01-28 15:52:58,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818723376] [2022-01-28 15:52:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:52:58,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:52:58,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:52:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:52:58,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:52:58,211 INFO L87 Difference]: Start difference. First operand 2514 states and 8989 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:53:05,304 INFO L93 Difference]: Finished difference Result 6252 states and 20283 transitions. [2022-01-28 15:53:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-28 15:53:05,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:53:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:53:05,318 INFO L225 Difference]: With dead ends: 6252 [2022-01-28 15:53:05,318 INFO L226 Difference]: Without dead ends: 6171 [2022-01-28 15:53:05,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3503 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1822, Invalid=8278, Unknown=0, NotChecked=0, Total=10100 [2022-01-28 15:53:05,340 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 671 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:53:05,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 479 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:53:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2022-01-28 15:53:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 2604. [2022-01-28 15:53:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.600076834421821) internal successors, (9371), 2603 states have internal predecessors, (9371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9371 transitions. [2022-01-28 15:53:05,417 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9371 transitions. Word has length 26 [2022-01-28 15:53:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:53:05,417 INFO L470 AbstractCegarLoop]: Abstraction has 2604 states and 9371 transitions. [2022-01-28 15:53:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9371 transitions. [2022-01-28 15:53:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:53:05,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:53:05,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:53:05,438 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 15:53:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:53:05,624 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:53:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:53:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 38 times [2022-01-28 15:53:05,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:53:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365294399] [2022-01-28 15:53:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:53:05,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:53:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:53:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:05,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:53:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365294399] [2022-01-28 15:53:05,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365294399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:53:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828869880] [2022-01-28 15:53:05,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:53:05,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:53:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:53:05,889 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 15:53:05,890 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 15:53:05,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:53:05,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:53:05,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:53:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:53:06,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:53:06,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 110 [2022-01-28 15:53:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:09,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:53:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:53:10,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:53:10,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:53:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 141 [2022-01-28 15:53:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828869880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:53:10,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:53:10,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-01-28 15:53:10,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247900408] [2022-01-28 15:53:10,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:53:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:53:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:53:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:53:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:53:10,805 INFO L87 Difference]: Start difference. First operand 2604 states and 9371 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:53:38,997 INFO L93 Difference]: Finished difference Result 10584 states and 34580 transitions. [2022-01-28 15:53:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2022-01-28 15:53:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:53:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:53:39,023 INFO L225 Difference]: With dead ends: 10584 [2022-01-28 15:53:39,023 INFO L226 Difference]: Without dead ends: 10498 [2022-01-28 15:53:39,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31962 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=10004, Invalid=61018, Unknown=0, NotChecked=0, Total=71022 [2022-01-28 15:53:39,038 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 976 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 3080 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 6578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 3080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3337 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:53:39,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 1217 Invalid, 6578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 3080 Invalid, 0 Unknown, 3337 Unchecked, 1.9s Time] [2022-01-28 15:53:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2022-01-28 15:53:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 2713. [2022-01-28 15:53:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 3.6382743362831858) internal successors, (9867), 2712 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 9867 transitions. [2022-01-28 15:53:39,150 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 9867 transitions. Word has length 26 [2022-01-28 15:53:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:53:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 9867 transitions. [2022-01-28 15:53:39,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:53:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 9867 transitions. [2022-01-28 15:53:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:53:39,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:53:39,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:53:39,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 15:53:39,377 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,SelfDestructingSolverStorable54 [2022-01-28 15:53:39,377 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:53:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:53:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash -353117544, now seen corresponding path program 39 times [2022-01-28 15:53:39,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:53:39,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601453634] [2022-01-28 15:53:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:53:39,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:53:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:53:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:39,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:53:39,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601453634] [2022-01-28 15:53:39,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601453634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:53:39,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565105897] [2022-01-28 15:53:39,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:53:39,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:53:39,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:53:39,682 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 15:53:39,683 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 15:53:39,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:53:39,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:53:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-28 15:53:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:53:40,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:53:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:53:40,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:53:40,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2022-01-28 15:53:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:40,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:53:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:53:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:53:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:53:41,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:53:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 81 [2022-01-28 15:53:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:53:41,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565105897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:53:41,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:53:41,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-01-28 15:53:41,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587202643] [2022-01-28 15:53:41,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:53:41,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:53:41,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:53:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:53:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:53:41,702 INFO L87 Difference]: Start difference. First operand 2713 states and 9867 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:09,534 INFO L93 Difference]: Finished difference Result 9855 states and 31556 transitions. [2022-01-28 15:54:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-01-28 15:54:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:09,557 INFO L225 Difference]: With dead ends: 9855 [2022-01-28 15:54:09,557 INFO L226 Difference]: Without dead ends: 9773 [2022-01-28 15:54:09,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24962 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=11669, Invalid=44263, Unknown=0, NotChecked=0, Total=55932 [2022-01-28 15:54:09,561 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1432 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 3043 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 3043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:09,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 767 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 3043 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-28 15:54:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9773 states. [2022-01-28 15:54:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9773 to 2834. [2022-01-28 15:54:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 3.677726791387222) internal successors, (10419), 2833 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 10419 transitions. [2022-01-28 15:54:09,720 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 10419 transitions. Word has length 26 [2022-01-28 15:54:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:09,721 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 10419 transitions. [2022-01-28 15:54:09,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 10419 transitions. [2022-01-28 15:54:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:09,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:09,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:09,743 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 15:54:09,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-28 15:54:09,943 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1122519044, now seen corresponding path program 15 times [2022-01-28 15:54:09,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017438501] [2022-01-28 15:54:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:09,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:10,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017438501] [2022-01-28 15:54:10,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017438501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21518530] [2022-01-28 15:54:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:54:10,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:10,360 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 15:54:10,361 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 15:54:10,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:54:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:54:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:54:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:10,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:54:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:11,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:11,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 141 [2022-01-28 15:54:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:12,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21518530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:12,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-28 15:54:12,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071125691] [2022-01-28 15:54:12,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:12,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:54:12,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:54:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:54:12,348 INFO L87 Difference]: Start difference. First operand 2834 states and 10419 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:15,752 INFO L93 Difference]: Finished difference Result 5093 states and 17486 transitions. [2022-01-28 15:54:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 15:54:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:15,764 INFO L225 Difference]: With dead ends: 5093 [2022-01-28 15:54:15,764 INFO L226 Difference]: Without dead ends: 5063 [2022-01-28 15:54:15,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=751, Invalid=3941, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 15:54:15,764 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 613 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 266 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:54:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2022-01-28 15:54:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 2861. [2022-01-28 15:54:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 3.6734265734265734) internal successors, (10506), 2860 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 10506 transitions. [2022-01-28 15:54:15,837 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 10506 transitions. Word has length 26 [2022-01-28 15:54:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 2861 states and 10506 transitions. [2022-01-28 15:54:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 10506 transitions. [2022-01-28 15:54:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:15,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:15,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:15,863 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 15:54:16,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:16,063 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 142676714, now seen corresponding path program 16 times [2022-01-28 15:54:16,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:16,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322686745] [2022-01-28 15:54:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:16,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:16,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322686745] [2022-01-28 15:54:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322686745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618201536] [2022-01-28 15:54:16,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:54:16,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:16,495 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 15:54:16,496 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 15:54:16,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:54:16,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:54:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:54:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:54:17,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:17,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:54:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:18,097 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:54:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:54:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618201536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:19,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:54:19,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940108103] [2022-01-28 15:54:19,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:19,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:54:19,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:54:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:54:19,542 INFO L87 Difference]: Start difference. First operand 2861 states and 10506 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:25,196 INFO L93 Difference]: Finished difference Result 5358 states and 18041 transitions. [2022-01-28 15:54:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 15:54:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:25,209 INFO L225 Difference]: With dead ends: 5358 [2022-01-28 15:54:25,209 INFO L226 Difference]: Without dead ends: 5321 [2022-01-28 15:54:25,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=791, Invalid=5215, Unknown=0, NotChecked=0, Total=6006 [2022-01-28 15:54:25,210 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 326 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:25,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 413 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:54:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2022-01-28 15:54:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 2874. [2022-01-28 15:54:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2873 states have (on average 3.673860076575009) internal successors, (10555), 2873 states have internal predecessors, (10555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 10555 transitions. [2022-01-28 15:54:25,314 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 10555 transitions. Word has length 26 [2022-01-28 15:54:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:25,314 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 10555 transitions. [2022-01-28 15:54:25,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 10555 transitions. [2022-01-28 15:54:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:25,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:25,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:25,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 15:54:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:25,536 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1451678616, now seen corresponding path program 17 times [2022-01-28 15:54:25,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129996868] [2022-01-28 15:54:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:25,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:25,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:25,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129996868] [2022-01-28 15:54:25,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129996868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:25,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235424172] [2022-01-28 15:54:25,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:54:25,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:25,772 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 15:54:25,772 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 15:54:25,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:54:25,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:54:25,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:54:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:54:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:26,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:54:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:27,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:27,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-28 15:54:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:28,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235424172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:28,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:28,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:54:28,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249873852] [2022-01-28 15:54:28,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:28,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:54:28,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:54:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:54:28,161 INFO L87 Difference]: Start difference. First operand 2874 states and 10555 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:39,552 INFO L93 Difference]: Finished difference Result 7617 states and 24262 transitions. [2022-01-28 15:54:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-28 15:54:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:39,612 INFO L225 Difference]: With dead ends: 7617 [2022-01-28 15:54:39,612 INFO L226 Difference]: Without dead ends: 7494 [2022-01-28 15:54:39,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2703, Invalid=16757, Unknown=0, NotChecked=0, Total=19460 [2022-01-28 15:54:39,613 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 708 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:39,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 720 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:54:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7494 states. [2022-01-28 15:54:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7494 to 3006. [2022-01-28 15:54:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.695840266222962) internal successors, (11106), 3005 states have internal predecessors, (11106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 11106 transitions. [2022-01-28 15:54:39,692 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 11106 transitions. Word has length 26 [2022-01-28 15:54:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 11106 transitions. [2022-01-28 15:54:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 11106 transitions. [2022-01-28 15:54:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:39,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:39,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:39,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-28 15:54:39,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:39,922 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1057572634, now seen corresponding path program 18 times [2022-01-28 15:54:39,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:39,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992060489] [2022-01-28 15:54:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:39,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:40,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992060489] [2022-01-28 15:54:40,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992060489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470202081] [2022-01-28 15:54:40,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:54:40,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:40,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:40,103 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 15:54:40,119 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 15:54:40,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:54:40,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:54:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:54:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:54:40,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:40,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:54:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:40,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:41,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:41,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:41,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 189 treesize of output 159 [2022-01-28 15:54:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:43,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470202081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:43,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:43,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 15:54:43,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678190127] [2022-01-28 15:54:43,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:54:43,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:54:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:54:43,095 INFO L87 Difference]: Start difference. First operand 3006 states and 11106 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:47,024 INFO L93 Difference]: Finished difference Result 6198 states and 20622 transitions. [2022-01-28 15:54:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 15:54:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:47,077 INFO L225 Difference]: With dead ends: 6198 [2022-01-28 15:54:47,077 INFO L226 Difference]: Without dead ends: 6130 [2022-01-28 15:54:47,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=944, Invalid=4026, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 15:54:47,078 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 461 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:47,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 441 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:54:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2022-01-28 15:54:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 3063. [2022-01-28 15:54:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.7021554539516655) internal successors, (11336), 3062 states have internal predecessors, (11336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 11336 transitions. [2022-01-28 15:54:47,151 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 11336 transitions. Word has length 26 [2022-01-28 15:54:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:47,151 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 11336 transitions. [2022-01-28 15:54:47,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 11336 transitions. [2022-01-28 15:54:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:47,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:47,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:47,172 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 15:54:47,371 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,SelfDestructingSolverStorable59 [2022-01-28 15:54:47,372 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 19 times [2022-01-28 15:54:47,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:47,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705410342] [2022-01-28 15:54:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:47,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:47,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705410342] [2022-01-28 15:54:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705410342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:47,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536328428] [2022-01-28 15:54:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:54:47,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:47,559 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 15:54:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:47,588 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 15:54:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:54:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:54:47,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:47,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:54:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:48,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:48,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:48,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-01-28 15:54:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536328428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:49,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:49,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 15:54:49,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102942051] [2022-01-28 15:54:49,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:49,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:54:49,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:54:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:54:49,958 INFO L87 Difference]: Start difference. First operand 3063 states and 11336 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:54:55,236 INFO L93 Difference]: Finished difference Result 6332 states and 20827 transitions. [2022-01-28 15:54:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:54:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:54:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:54:55,252 INFO L225 Difference]: With dead ends: 6332 [2022-01-28 15:54:55,252 INFO L226 Difference]: Without dead ends: 6201 [2022-01-28 15:54:55,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=963, Invalid=4293, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 15:54:55,253 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 391 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:54:55,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 410 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:54:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2022-01-28 15:54:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 3158. [2022-01-28 15:54:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.692112765283497) internal successors, (11656), 3157 states have internal predecessors, (11656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 11656 transitions. [2022-01-28 15:54:55,335 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 11656 transitions. Word has length 26 [2022-01-28 15:54:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:54:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 3158 states and 11656 transitions. [2022-01-28 15:54:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:54:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 11656 transitions. [2022-01-28 15:54:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:54:55,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:54:55,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:54:55,362 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 15:54:55,554 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,SelfDestructingSolverStorable60 [2022-01-28 15:54:55,555 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:54:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:54:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 529023014, now seen corresponding path program 20 times [2022-01-28 15:54:55,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:54:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700884496] [2022-01-28 15:54:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:54:55,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:54:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:54:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:55,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:54:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700884496] [2022-01-28 15:54:55,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700884496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:54:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612367000] [2022-01-28 15:54:55,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:54:55,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:54:55,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:54:55,786 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 15:54:55,787 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 15:54:55,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:54:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:54:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:54:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:54:56,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:54:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:56,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:54:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:54:57,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:54:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 183 treesize of output 141 [2022-01-28 15:54:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:54:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612367000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:54:58,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:54:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-28 15:54:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029559151] [2022-01-28 15:54:58,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:54:58,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:54:58,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:54:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:54:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:54:58,491 INFO L87 Difference]: Start difference. First operand 3158 states and 11656 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:06,664 INFO L93 Difference]: Finished difference Result 5637 states and 19006 transitions. [2022-01-28 15:55:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-28 15:55:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:06,675 INFO L225 Difference]: With dead ends: 5637 [2022-01-28 15:55:06,675 INFO L226 Difference]: Without dead ends: 5533 [2022-01-28 15:55:06,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1454, Invalid=8248, Unknown=0, NotChecked=0, Total=9702 [2022-01-28 15:55:06,676 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 475 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:06,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 526 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:55:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2022-01-28 15:55:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3208. [2022-01-28 15:55:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 3.6894293732460244) internal successors, (11832), 3207 states have internal predecessors, (11832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 11832 transitions. [2022-01-28 15:55:06,744 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 11832 transitions. Word has length 26 [2022-01-28 15:55:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:06,744 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 11832 transitions. [2022-01-28 15:55:06,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 11832 transitions. [2022-01-28 15:55:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:06,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:06,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:06,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-28 15:55:06,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-28 15:55:06,956 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 21 times [2022-01-28 15:55:06,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:06,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560237831] [2022-01-28 15:55:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:06,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:07,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560237831] [2022-01-28 15:55:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560237831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054551602] [2022-01-28 15:55:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:55:07,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:07,205 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 15:55:07,206 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 15:55:07,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:55:07,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:55:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:07,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:07,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:55:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:08,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:08,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:08,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 141 [2022-01-28 15:55:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:09,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054551602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:09,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:09,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-28 15:55:09,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818713816] [2022-01-28 15:55:09,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:09,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:55:09,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:55:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:55:09,110 INFO L87 Difference]: Start difference. First operand 3208 states and 11832 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:13,945 INFO L93 Difference]: Finished difference Result 5820 states and 20158 transitions. [2022-01-28 15:55:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:55:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:13,957 INFO L225 Difference]: With dead ends: 5820 [2022-01-28 15:55:13,957 INFO L226 Difference]: Without dead ends: 5778 [2022-01-28 15:55:13,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1077, Invalid=4929, Unknown=0, NotChecked=0, Total=6006 [2022-01-28 15:55:13,958 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 613 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:13,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 415 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1461 Invalid, 0 Unknown, 428 Unchecked, 0.7s Time] [2022-01-28 15:55:13,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2022-01-28 15:55:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 3259. [2022-01-28 15:55:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 3.6844689993861266) internal successors, (12004), 3258 states have internal predecessors, (12004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 12004 transitions. [2022-01-28 15:55:14,024 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 12004 transitions. Word has length 26 [2022-01-28 15:55:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:14,024 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 12004 transitions. [2022-01-28 15:55:14,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 12004 transitions. [2022-01-28 15:55:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:14,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:14,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:14,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-28 15:55:14,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:14,245 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:14,246 INFO L85 PathProgramCache]: Analyzing trace with hash 276612340, now seen corresponding path program 22 times [2022-01-28 15:55:14,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:14,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406471491] [2022-01-28 15:55:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:14,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:14,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406471491] [2022-01-28 15:55:14,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406471491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79588795] [2022-01-28 15:55:14,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:55:14,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:14,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:14,466 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 15:55:14,467 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 15:55:14,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:55:14,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:55:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:14,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:55:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:55:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:14,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:15,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:15,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:15,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 153 [2022-01-28 15:55:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79588795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:16,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:16,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 15:55:16,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408100476] [2022-01-28 15:55:16,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:16,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:55:16,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:55:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:55:16,970 INFO L87 Difference]: Start difference. First operand 3259 states and 12004 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:20,033 INFO L93 Difference]: Finished difference Result 5705 states and 19109 transitions. [2022-01-28 15:55:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 15:55:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:20,044 INFO L225 Difference]: With dead ends: 5705 [2022-01-28 15:55:20,044 INFO L226 Difference]: Without dead ends: 5592 [2022-01-28 15:55:20,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=658, Invalid=3002, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 15:55:20,046 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 379 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:20,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 344 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:55:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2022-01-28 15:55:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 3235. [2022-01-28 15:55:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 3.688311688311688) internal successors, (11928), 3234 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 11928 transitions. [2022-01-28 15:55:20,112 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 11928 transitions. Word has length 26 [2022-01-28 15:55:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:20,113 INFO L470 AbstractCegarLoop]: Abstraction has 3235 states and 11928 transitions. [2022-01-28 15:55:20,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 11928 transitions. [2022-01-28 15:55:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:20,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:20,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:20,135 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 15:55:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:20,335 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 777923186, now seen corresponding path program 23 times [2022-01-28 15:55:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849725896] [2022-01-28 15:55:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:20,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:20,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849725896] [2022-01-28 15:55:20,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849725896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646654408] [2022-01-28 15:55:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:55:20,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:20,543 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 15:55:20,565 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 15:55:20,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:55:20,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:55:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:20,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 88 [2022-01-28 15:55:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:21,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:22,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 141 [2022-01-28 15:55:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646654408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:22,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:22,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-28 15:55:22,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547859631] [2022-01-28 15:55:22,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:55:22,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:55:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:55:22,748 INFO L87 Difference]: Start difference. First operand 3235 states and 11928 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:32,620 INFO L93 Difference]: Finished difference Result 6971 states and 23464 transitions. [2022-01-28 15:55:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-28 15:55:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:32,633 INFO L225 Difference]: With dead ends: 6971 [2022-01-28 15:55:32,633 INFO L226 Difference]: Without dead ends: 6895 [2022-01-28 15:55:32,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5775 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2364, Invalid=13136, Unknown=0, NotChecked=0, Total=15500 [2022-01-28 15:55:32,634 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 587 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:32,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 566 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1878 Invalid, 0 Unknown, 173 Unchecked, 1.1s Time] [2022-01-28 15:55:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2022-01-28 15:55:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 3254. [2022-01-28 15:55:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 3.6910544113126345) internal successors, (12007), 3253 states have internal predecessors, (12007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 12007 transitions. [2022-01-28 15:55:32,710 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 12007 transitions. Word has length 26 [2022-01-28 15:55:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:32,710 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 12007 transitions. [2022-01-28 15:55:32,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 12007 transitions. [2022-01-28 15:55:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:32,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:32,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-28 15:55:32,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-28 15:55:32,931 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2033909172, now seen corresponding path program 24 times [2022-01-28 15:55:32,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575173] [2022-01-28 15:55:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:32,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:33,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575173] [2022-01-28 15:55:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68009424] [2022-01-28 15:55:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:55:33,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:33,155 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 15:55:33,191 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 15:55:33,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:55:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:55:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:55:33,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:33,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:55:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:34,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:34,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:34,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 149 [2022-01-28 15:55:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68009424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:36,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:36,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:55:36,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811445558] [2022-01-28 15:55:36,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:55:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:55:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:55:36,585 INFO L87 Difference]: Start difference. First operand 3254 states and 12007 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:41,281 INFO L93 Difference]: Finished difference Result 6564 states and 21953 transitions. [2022-01-28 15:55:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:55:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:41,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:41,293 INFO L225 Difference]: With dead ends: 6564 [2022-01-28 15:55:41,293 INFO L226 Difference]: Without dead ends: 6477 [2022-01-28 15:55:41,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1116, Invalid=5690, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 15:55:41,294 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 417 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:41,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 424 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1515 Invalid, 0 Unknown, 450 Unchecked, 0.8s Time] [2022-01-28 15:55:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6477 states. [2022-01-28 15:55:41,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6477 to 3275. [2022-01-28 15:55:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 3.693341478313989) internal successors, (12092), 3274 states have internal predecessors, (12092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 12092 transitions. [2022-01-28 15:55:41,364 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 12092 transitions. Word has length 26 [2022-01-28 15:55:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 12092 transitions. [2022-01-28 15:55:41,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 12092 transitions. [2022-01-28 15:55:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:41,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:41,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:41,384 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 15:55:41,584 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,SelfDestructingSolverStorable65 [2022-01-28 15:55:41,584 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 25 times [2022-01-28 15:55:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319305959] [2022-01-28 15:55:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:41,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:41,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319305959] [2022-01-28 15:55:41,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319305959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:41,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455988302] [2022-01-28 15:55:41,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:55:41,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:41,879 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 15:55:41,879 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 15:55:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:55:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:55:42,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:42,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:42,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 78 [2022-01-28 15:55:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:42,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:43,322 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:55:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 149 [2022-01-28 15:55:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:45,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455988302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:45,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:45,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:55:45,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252758686] [2022-01-28 15:55:45,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:45,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:55:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:55:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:55:45,293 INFO L87 Difference]: Start difference. First operand 3275 states and 12092 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:49,037 INFO L93 Difference]: Finished difference Result 5691 states and 19448 transitions. [2022-01-28 15:55:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 15:55:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:49,048 INFO L225 Difference]: With dead ends: 5691 [2022-01-28 15:55:49,048 INFO L226 Difference]: Without dead ends: 5631 [2022-01-28 15:55:49,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=852, Invalid=4550, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 15:55:49,049 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 382 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:49,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 329 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:55:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2022-01-28 15:55:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3311. [2022-01-28 15:55:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 3310 states have (on average 3.693655589123867) internal successors, (12226), 3310 states have internal predecessors, (12226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 12226 transitions. [2022-01-28 15:55:49,113 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 12226 transitions. Word has length 26 [2022-01-28 15:55:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:49,113 INFO L470 AbstractCegarLoop]: Abstraction has 3311 states and 12226 transitions. [2022-01-28 15:55:49,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 12226 transitions. [2022-01-28 15:55:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:49,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:49,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:49,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-28 15:55:49,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:49,323 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 26 times [2022-01-28 15:55:49,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:49,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470601088] [2022-01-28 15:55:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:49,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:49,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470601088] [2022-01-28 15:55:49,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470601088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408811816] [2022-01-28 15:55:49,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:55:49,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:49,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:49,599 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 15:55:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:55:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:49,635 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 15:55:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:55:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:55:49,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:55:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:55:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:50,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:50,877 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:55:50,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 149 [2022-01-28 15:55:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408811816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:51,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:55:51,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515460095] [2022-01-28 15:55:51,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:51,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:55:51,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:55:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:55:51,907 INFO L87 Difference]: Start difference. First operand 3311 states and 12226 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:55:56,920 INFO L93 Difference]: Finished difference Result 5998 states and 20421 transitions. [2022-01-28 15:55:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 15:55:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:55:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:55:56,932 INFO L225 Difference]: With dead ends: 5998 [2022-01-28 15:55:56,932 INFO L226 Difference]: Without dead ends: 5918 [2022-01-28 15:55:56,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=874, Invalid=5132, Unknown=0, NotChecked=0, Total=6006 [2022-01-28 15:55:56,933 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 376 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:55:56,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 435 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:55:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5918 states. [2022-01-28 15:55:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5918 to 3317. [2022-01-28 15:55:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 3.693003618817853) internal successors, (12246), 3316 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 12246 transitions. [2022-01-28 15:55:57,001 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 12246 transitions. Word has length 26 [2022-01-28 15:55:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:55:57,001 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 12246 transitions. [2022-01-28 15:55:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:55:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 12246 transitions. [2022-01-28 15:55:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:55:57,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:55:57,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:55:57,037 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 15:55:57,223 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,SelfDestructingSolverStorable67 [2022-01-28 15:55:57,223 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:55:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:55:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 457853170, now seen corresponding path program 40 times [2022-01-28 15:55:57,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:55:57,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250904418] [2022-01-28 15:55:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:55:57,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:55:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:55:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:57,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:55:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250904418] [2022-01-28 15:55:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250904418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:55:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471081322] [2022-01-28 15:55:57,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:55:57,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:55:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:55:57,547 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 15:55:57,548 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 15:55:57,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:55:57,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:55:57,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:55:57,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:55:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:55:58,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:58,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:55:58,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 15:55:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:58,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:55:58,834 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:55:58,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 141 [2022-01-28 15:55:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:55:59,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471081322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:55:59,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:55:59,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-28 15:55:59,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300050330] [2022-01-28 15:55:59,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:55:59,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:55:59,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:55:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:55:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:55:59,396 INFO L87 Difference]: Start difference. First operand 3317 states and 12246 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:56:02,398 INFO L93 Difference]: Finished difference Result 5281 states and 18374 transitions. [2022-01-28 15:56:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:56:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:56:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:56:02,409 INFO L225 Difference]: With dead ends: 5281 [2022-01-28 15:56:02,409 INFO L226 Difference]: Without dead ends: 5180 [2022-01-28 15:56:02,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=705, Invalid=3987, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 15:56:02,410 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 269 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:56:02,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 411 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:56:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2022-01-28 15:56:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3363. [2022-01-28 15:56:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 3.6820345032718618) internal successors, (12379), 3362 states have internal predecessors, (12379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 12379 transitions. [2022-01-28 15:56:02,474 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 12379 transitions. Word has length 26 [2022-01-28 15:56:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:56:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 12379 transitions. [2022-01-28 15:56:02,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 12379 transitions. [2022-01-28 15:56:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:56:02,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:56:02,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:56:02,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-28 15:56:02,695 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,SelfDestructingSolverStorable68 [2022-01-28 15:56:02,695 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:56:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:56:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 41 times [2022-01-28 15:56:02,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:56:02,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108692819] [2022-01-28 15:56:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:56:02,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:56:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:56:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:02,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:56:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108692819] [2022-01-28 15:56:02,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108692819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:56:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025660956] [2022-01-28 15:56:02,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:56:02,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:02,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:56:02,989 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 15:56:02,990 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 15:56:03,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:56:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:56:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:56:03,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:56:03,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:56:03,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:03,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 70 [2022-01-28 15:56:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:56:03,871 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:56:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 141 [2022-01-28 15:56:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:04,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025660956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:56:04,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:56:04,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-28 15:56:04,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707325345] [2022-01-28 15:56:04,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:56:04,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:56:04,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:56:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:56:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:56:04,250 INFO L87 Difference]: Start difference. First operand 3363 states and 12379 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:56:08,085 INFO L93 Difference]: Finished difference Result 5842 states and 20231 transitions. [2022-01-28 15:56:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-28 15:56:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:56:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:56:08,098 INFO L225 Difference]: With dead ends: 5842 [2022-01-28 15:56:08,098 INFO L226 Difference]: Without dead ends: 5798 [2022-01-28 15:56:08,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2022-01-28 15:56:08,099 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 269 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:56:08,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 534 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1946 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2022-01-28 15:56:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2022-01-28 15:56:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 3363. [2022-01-28 15:56:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 3.6856038072575847) internal successors, (12391), 3362 states have internal predecessors, (12391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 12391 transitions. [2022-01-28 15:56:08,174 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 12391 transitions. Word has length 26 [2022-01-28 15:56:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:56:08,175 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 12391 transitions. [2022-01-28 15:56:08,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 12391 transitions. [2022-01-28 15:56:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:56:08,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:56:08,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:56:08,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-28 15:56:08,396 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,SelfDestructingSolverStorable69 [2022-01-28 15:56:08,396 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:56:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:56:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 27 times [2022-01-28 15:56:08,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:56:08,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467907154] [2022-01-28 15:56:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:56:08,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:56:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:56:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:08,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:56:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467907154] [2022-01-28 15:56:08,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467907154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:56:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557431234] [2022-01-28 15:56:08,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:56:08,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:56:08,670 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 15:56:08,671 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 15:56:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:56:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:56:08,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:56:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:56:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:56:09,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:09,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:56:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:09,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:56:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:09,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:09,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 149 [2022-01-28 15:56:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:10,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557431234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:56:10,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:56:10,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:56:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902397487] [2022-01-28 15:56:10,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:56:10,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:56:10,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:56:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:56:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:56:10,616 INFO L87 Difference]: Start difference. First operand 3363 states and 12391 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:56:14,187 INFO L93 Difference]: Finished difference Result 6923 states and 22951 transitions. [2022-01-28 15:56:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:56:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:56:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:56:14,201 INFO L225 Difference]: With dead ends: 6923 [2022-01-28 15:56:14,202 INFO L226 Difference]: Without dead ends: 6893 [2022-01-28 15:56:14,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 15:56:14,202 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 567 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:56:14,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 357 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1213 Invalid, 0 Unknown, 173 Unchecked, 0.7s Time] [2022-01-28 15:56:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6893 states. [2022-01-28 15:56:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6893 to 3448. [2022-01-28 15:56:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.688424717145344) internal successors, (12714), 3447 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12714 transitions. [2022-01-28 15:56:14,279 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12714 transitions. Word has length 26 [2022-01-28 15:56:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:56:14,279 INFO L470 AbstractCegarLoop]: Abstraction has 3448 states and 12714 transitions. [2022-01-28 15:56:14,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12714 transitions. [2022-01-28 15:56:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:56:14,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:56:14,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:56:14,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 15:56:14,495 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,SelfDestructingSolverStorable70 [2022-01-28 15:56:14,496 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:56:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:56:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1056144568, now seen corresponding path program 28 times [2022-01-28 15:56:14,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:56:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852187065] [2022-01-28 15:56:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:56:14,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:56:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:56:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:15,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:56:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852187065] [2022-01-28 15:56:15,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852187065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:56:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145910749] [2022-01-28 15:56:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:56:15,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:56:15,019 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 15:56:15,020 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 15:56:15,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:56:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:56:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:56:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:56:15,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:56:15,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:15,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:56:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:15,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:56:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:16,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 149 [2022-01-28 15:56:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:17,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145910749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:56:17,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:56:17,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:56:17,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512163365] [2022-01-28 15:56:17,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:56:17,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:56:17,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:56:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:56:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:56:17,699 INFO L87 Difference]: Start difference. First operand 3448 states and 12714 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:56:22,632 INFO L93 Difference]: Finished difference Result 6814 states and 22719 transitions. [2022-01-28 15:56:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-28 15:56:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:56:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:56:22,645 INFO L225 Difference]: With dead ends: 6814 [2022-01-28 15:56:22,645 INFO L226 Difference]: Without dead ends: 6784 [2022-01-28 15:56:22,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1204, Invalid=4198, Unknown=0, NotChecked=0, Total=5402 [2022-01-28 15:56:22,646 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 541 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:56:22,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 388 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1115 Invalid, 0 Unknown, 284 Unchecked, 0.7s Time] [2022-01-28 15:56:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2022-01-28 15:56:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 3462. [2022-01-28 15:56:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.6908407974573825) internal successors, (12774), 3461 states have internal predecessors, (12774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 12774 transitions. [2022-01-28 15:56:22,718 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 12774 transitions. Word has length 26 [2022-01-28 15:56:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:56:22,718 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 12774 transitions. [2022-01-28 15:56:22,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 12774 transitions. [2022-01-28 15:56:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:56:22,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:56:22,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:56:22,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-28 15:56:22,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:22,927 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:56:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:56:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash -561388212, now seen corresponding path program 29 times [2022-01-28 15:56:22,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:56:22,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806319002] [2022-01-28 15:56:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:56:22,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:56:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:56:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:23,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:56:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806319002] [2022-01-28 15:56:23,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806319002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:56:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923656570] [2022-01-28 15:56:23,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:56:23,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:56:23,145 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 15:56:23,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:56:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:56:23,192 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 15:56:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:56:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:56:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:56:23,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:23,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:56:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:23,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:56:24,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:24,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-01-28 15:56:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:25,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923656570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:56:25,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:56:25,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:56:25,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472268207] [2022-01-28 15:56:25,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:56:25,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:56:25,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:56:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:56:25,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:56:25,549 INFO L87 Difference]: Start difference. First operand 3462 states and 12774 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:56:32,713 INFO L93 Difference]: Finished difference Result 7670 states and 25455 transitions. [2022-01-28 15:56:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-28 15:56:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:56:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:56:32,729 INFO L225 Difference]: With dead ends: 7670 [2022-01-28 15:56:32,729 INFO L226 Difference]: Without dead ends: 7632 [2022-01-28 15:56:32,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2610 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1461, Invalid=6021, Unknown=0, NotChecked=0, Total=7482 [2022-01-28 15:56:32,730 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 535 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 775 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:56:32,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 395 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 969 Invalid, 0 Unknown, 775 Unchecked, 0.7s Time] [2022-01-28 15:56:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2022-01-28 15:56:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 3511. [2022-01-28 15:56:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 3.6974358974358976) internal successors, (12978), 3510 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 12978 transitions. [2022-01-28 15:56:32,828 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 12978 transitions. Word has length 26 [2022-01-28 15:56:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:56:32,828 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 12978 transitions. [2022-01-28 15:56:32,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:56:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 12978 transitions. [2022-01-28 15:56:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:56:32,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:56:32,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:56:32,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 15:56:33,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:33,049 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:56:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:56:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1809601360, now seen corresponding path program 42 times [2022-01-28 15:56:33,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:56:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793231165] [2022-01-28 15:56:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:56:33,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:56:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:56:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:33,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:56:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793231165] [2022-01-28 15:56:33,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793231165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:56:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809991314] [2022-01-28 15:56:33,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:56:33,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:56:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:56:33,285 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 15:56:33,286 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 15:56:33,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:56:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:56:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:56:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:56:33,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:33,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 110 [2022-01-28 15:56:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:36,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:56:36,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:36,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:56:36,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:56:36,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 183 treesize of output 141 [2022-01-28 15:56:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:56:37,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809991314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:56:37,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:56:37,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-01-28 15:56:37,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048972358] [2022-01-28 15:56:37,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:56:37,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:56:37,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:56:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:56:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:56:37,288 INFO L87 Difference]: Start difference. First operand 3511 states and 12978 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:00,669 INFO L93 Difference]: Finished difference Result 12258 states and 42341 transitions. [2022-01-28 15:57:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-01-28 15:57:00,670 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:00,696 INFO L225 Difference]: With dead ends: 12258 [2022-01-28 15:57:00,696 INFO L226 Difference]: Without dead ends: 12179 [2022-01-28 15:57:00,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28822 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=8458, Invalid=57334, Unknown=0, NotChecked=0, Total=65792 [2022-01-28 15:57:00,699 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 806 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 5129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2354 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:00,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 904 Invalid, 5129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2604 Invalid, 0 Unknown, 2354 Unchecked, 1.4s Time] [2022-01-28 15:57:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12179 states. [2022-01-28 15:57:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12179 to 3708. [2022-01-28 15:57:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.722956568653898) internal successors, (13801), 3707 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 13801 transitions. [2022-01-28 15:57:00,830 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 13801 transitions. Word has length 26 [2022-01-28 15:57:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:00,830 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 13801 transitions. [2022-01-28 15:57:00,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 13801 transitions. [2022-01-28 15:57:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:00,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:00,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:00,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-28 15:57:01,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:01,038 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1901962258, now seen corresponding path program 43 times [2022-01-28 15:57:01,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:01,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474418652] [2022-01-28 15:57:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:01,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:01,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474418652] [2022-01-28 15:57:01,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474418652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916258570] [2022-01-28 15:57:01,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:57:01,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:01,298 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 15:57:01,312 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 15:57:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-28 15:57:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:01,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:01,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 102 [2022-01-28 15:57:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:03,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:57:03,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:03,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:03,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:03,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 137 [2022-01-28 15:57:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916258570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:57:04,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:57:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-01-28 15:57:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952009256] [2022-01-28 15:57:04,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:57:04,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:57:04,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:57:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:57:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:57:04,917 INFO L87 Difference]: Start difference. First operand 3708 states and 13801 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:09,948 INFO L93 Difference]: Finished difference Result 6945 states and 24182 transitions. [2022-01-28 15:57:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-28 15:57:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:09,963 INFO L225 Difference]: With dead ends: 6945 [2022-01-28 15:57:09,964 INFO L226 Difference]: Without dead ends: 6900 [2022-01-28 15:57:09,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1605, Invalid=7707, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 15:57:09,965 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 381 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:09,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 463 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1144 Invalid, 0 Unknown, 691 Unchecked, 0.7s Time] [2022-01-28 15:57:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2022-01-28 15:57:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 3865. [2022-01-28 15:57:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 3864 states have (on average 3.7215320910973086) internal successors, (14380), 3864 states have internal predecessors, (14380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 14380 transitions. [2022-01-28 15:57:10,088 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 14380 transitions. Word has length 26 [2022-01-28 15:57:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:10,088 INFO L470 AbstractCegarLoop]: Abstraction has 3865 states and 14380 transitions. [2022-01-28 15:57:10,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 14380 transitions. [2022-01-28 15:57:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:10,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:10,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:10,111 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 15:57:10,307 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,SelfDestructingSolverStorable74 [2022-01-28 15:57:10,307 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 30 times [2022-01-28 15:57:10,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:10,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7643906] [2022-01-28 15:57:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:10,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:10,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7643906] [2022-01-28 15:57:10,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7643906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97517671] [2022-01-28 15:57:10,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:57:10,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:10,687 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 15:57:10,688 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 15:57:10,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:57:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:57:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:57:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:11,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:11,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:57:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:12,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:57:12,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:12,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:12,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:12,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 183 treesize of output 141 [2022-01-28 15:57:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:13,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97517671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:57:13,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:57:13,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-01-28 15:57:13,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611877231] [2022-01-28 15:57:13,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:57:13,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:57:13,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:57:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:57:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:57:13,668 INFO L87 Difference]: Start difference. First operand 3865 states and 14380 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:22,381 INFO L93 Difference]: Finished difference Result 7639 states and 26294 transitions. [2022-01-28 15:57:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-28 15:57:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:22,421 INFO L225 Difference]: With dead ends: 7639 [2022-01-28 15:57:22,421 INFO L226 Difference]: Without dead ends: 7597 [2022-01-28 15:57:22,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1530, Invalid=7976, Unknown=0, NotChecked=0, Total=9506 [2022-01-28 15:57:22,422 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 522 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 705 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:22,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 568 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1579 Invalid, 0 Unknown, 705 Unchecked, 1.0s Time] [2022-01-28 15:57:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2022-01-28 15:57:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 3894. [2022-01-28 15:57:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 3.7230927305419983) internal successors, (14494), 3893 states have internal predecessors, (14494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 14494 transitions. [2022-01-28 15:57:22,505 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 14494 transitions. Word has length 26 [2022-01-28 15:57:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:22,505 INFO L470 AbstractCegarLoop]: Abstraction has 3894 states and 14494 transitions. [2022-01-28 15:57:22,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 14494 transitions. [2022-01-28 15:57:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:22,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:22,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:22,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 15:57:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:22,727 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 31 times [2022-01-28 15:57:22,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:22,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023579881] [2022-01-28 15:57:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:22,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:22,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023579881] [2022-01-28 15:57:22,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023579881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121361623] [2022-01-28 15:57:22,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:57:22,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:22,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:22,936 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 15:57:22,938 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 15:57:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:22,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:57:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:23,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:57:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:23,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:57:23,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:23,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:23,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 157 [2022-01-28 15:57:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:25,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121361623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:57:25,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:57:25,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 15:57:25,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696823322] [2022-01-28 15:57:25,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:57:25,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:57:25,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:57:25,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:57:25,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:57:25,438 INFO L87 Difference]: Start difference. First operand 3894 states and 14494 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:29,267 INFO L93 Difference]: Finished difference Result 7292 states and 24615 transitions. [2022-01-28 15:57:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:57:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:29,283 INFO L225 Difference]: With dead ends: 7292 [2022-01-28 15:57:29,283 INFO L226 Difference]: Without dead ends: 7231 [2022-01-28 15:57:29,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=947, Invalid=3883, Unknown=0, NotChecked=0, Total=4830 [2022-01-28 15:57:29,284 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 435 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:29,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 369 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1065 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-01-28 15:57:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7231 states. [2022-01-28 15:57:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7231 to 3927. [2022-01-28 15:57:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 3.7218543046357615) internal successors, (14612), 3926 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 14612 transitions. [2022-01-28 15:57:29,376 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 14612 transitions. Word has length 26 [2022-01-28 15:57:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:29,376 INFO L470 AbstractCegarLoop]: Abstraction has 3927 states and 14612 transitions. [2022-01-28 15:57:29,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 14612 transitions. [2022-01-28 15:57:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:29,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:29,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:29,399 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 15:57:29,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:29,599 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 32 times [2022-01-28 15:57:29,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:29,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425562935] [2022-01-28 15:57:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:29,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:29,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425562935] [2022-01-28 15:57:29,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425562935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232318414] [2022-01-28 15:57:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:57:29,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:29,924 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 15:57:29,948 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 15:57:29,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:57:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:57:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:57:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:30,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:30,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:57:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:31,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:57:31,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:31,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:57:31,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:31,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 141 [2022-01-28 15:57:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:32,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232318414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:57:32,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:57:32,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:57:32,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450156997] [2022-01-28 15:57:32,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:57:32,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:57:32,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:57:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:57:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:57:32,235 INFO L87 Difference]: Start difference. First operand 3927 states and 14612 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:43,661 INFO L93 Difference]: Finished difference Result 8434 states and 28712 transitions. [2022-01-28 15:57:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-28 15:57:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:43,706 INFO L225 Difference]: With dead ends: 8434 [2022-01-28 15:57:43,706 INFO L226 Difference]: Without dead ends: 8361 [2022-01-28 15:57:43,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6183 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2569, Invalid=14201, Unknown=0, NotChecked=0, Total=16770 [2022-01-28 15:57:43,707 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 712 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 994 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:43,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 694 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1898 Invalid, 0 Unknown, 994 Unchecked, 1.2s Time] [2022-01-28 15:57:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8361 states. [2022-01-28 15:57:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8361 to 3933. [2022-01-28 15:57:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3933 states, 3932 states have (on average 3.7245676500508647) internal successors, (14645), 3932 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3933 states to 3933 states and 14645 transitions. [2022-01-28 15:57:43,798 INFO L78 Accepts]: Start accepts. Automaton has 3933 states and 14645 transitions. Word has length 26 [2022-01-28 15:57:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:43,798 INFO L470 AbstractCegarLoop]: Abstraction has 3933 states and 14645 transitions. [2022-01-28 15:57:43,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3933 states and 14645 transitions. [2022-01-28 15:57:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:43,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:43,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:43,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 15:57:44,019 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,SelfDestructingSolverStorable77 [2022-01-28 15:57:44,019 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1924650992, now seen corresponding path program 44 times [2022-01-28 15:57:44,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099383929] [2022-01-28 15:57:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:44,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:44,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:44,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099383929] [2022-01-28 15:57:44,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099383929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:44,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692185934] [2022-01-28 15:57:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:57:44,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:44,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:44,271 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 15:57:44,272 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 15:57:44,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:57:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:57:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:57:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:44,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:44,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:44,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2022-01-28 15:57:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:57:45,895 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:57:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 141 [2022-01-28 15:57:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:46,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692185934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:57:46,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:57:46,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-28 15:57:46,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072086998] [2022-01-28 15:57:46,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:57:46,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:57:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:57:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:57:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:57:46,549 INFO L87 Difference]: Start difference. First operand 3933 states and 14645 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:57:58,444 INFO L93 Difference]: Finished difference Result 8459 states and 28945 transitions. [2022-01-28 15:57:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-28 15:57:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:57:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:57:58,464 INFO L225 Difference]: With dead ends: 8459 [2022-01-28 15:57:58,464 INFO L226 Difference]: Without dead ends: 8391 [2022-01-28 15:57:58,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10285 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3964, Invalid=21476, Unknown=0, NotChecked=0, Total=25440 [2022-01-28 15:57:58,465 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 450 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:57:58,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 855 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-28 15:57:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8391 states. [2022-01-28 15:57:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8391 to 4002. [2022-01-28 15:57:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 4001 states have (on average 3.718320419895026) internal successors, (14877), 4001 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 14877 transitions. [2022-01-28 15:57:58,576 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 14877 transitions. Word has length 26 [2022-01-28 15:57:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:57:58,576 INFO L470 AbstractCegarLoop]: Abstraction has 4002 states and 14877 transitions. [2022-01-28 15:57:58,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:57:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 14877 transitions. [2022-01-28 15:57:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:57:58,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:57:58,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:57:58,599 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 15:57:58,799 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,SelfDestructingSolverStorable78 [2022-01-28 15:57:58,799 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:57:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:57:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -69486732, now seen corresponding path program 45 times [2022-01-28 15:57:58,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:57:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152140914] [2022-01-28 15:57:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:57:58,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:57:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:57:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:57:59,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:57:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152140914] [2022-01-28 15:57:59,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152140914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:57:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212238209] [2022-01-28 15:57:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:57:59,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:57:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:57:59,113 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 15:57:59,114 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 15:57:59,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:57:59,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:57:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:57:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:57:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:57:59,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:57:59,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 106 [2022-01-28 15:58:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:00,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:58:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:01,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:01,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:01,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 87 [2022-01-28 15:58:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212238209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:58:01,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:58:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 15:58:01,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911390188] [2022-01-28 15:58:01,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:58:01,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:58:01,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:58:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:58:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:58:01,606 INFO L87 Difference]: Start difference. First operand 4002 states and 14877 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:58:19,537 INFO L93 Difference]: Finished difference Result 7814 states and 26571 transitions. [2022-01-28 15:58:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-28 15:58:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:58:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:58:19,552 INFO L225 Difference]: With dead ends: 7814 [2022-01-28 15:58:19,553 INFO L226 Difference]: Without dead ends: 7749 [2022-01-28 15:58:19,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9427 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=3735, Invalid=20445, Unknown=0, NotChecked=0, Total=24180 [2022-01-28 15:58:19,554 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 803 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:58:19,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 615 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2133 Invalid, 0 Unknown, 318 Unchecked, 1.4s Time] [2022-01-28 15:58:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2022-01-28 15:58:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 4115. [2022-01-28 15:58:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 3.7097715119105494) internal successors, (15262), 4114 states have internal predecessors, (15262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 15262 transitions. [2022-01-28 15:58:19,648 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 15262 transitions. Word has length 26 [2022-01-28 15:58:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:58:19,648 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 15262 transitions. [2022-01-28 15:58:19,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 15262 transitions. [2022-01-28 15:58:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:58:19,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:58:19,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:58:19,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-28 15:58:19,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:19,871 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:58:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:58:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 46 times [2022-01-28 15:58:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:58:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954994139] [2022-01-28 15:58:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:58:19,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:58:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:58:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:20,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:58:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954994139] [2022-01-28 15:58:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954994139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:58:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842240358] [2022-01-28 15:58:20,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:58:20,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:20,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:58:20,197 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 15:58:20,198 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 15:58:20,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:58:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:58:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:58:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:58:20,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:20,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 70 [2022-01-28 15:58:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:20,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:58:21,432 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:58:21,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 145 [2022-01-28 15:58:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:22,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842240358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:58:22,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:58:22,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 15:58:22,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928771010] [2022-01-28 15:58:22,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:58:22,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:58:22,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:58:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:58:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:58:22,133 INFO L87 Difference]: Start difference. First operand 4115 states and 15262 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:58:28,673 INFO L93 Difference]: Finished difference Result 7266 states and 25174 transitions. [2022-01-28 15:58:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-28 15:58:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:58:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:58:28,689 INFO L225 Difference]: With dead ends: 7266 [2022-01-28 15:58:28,690 INFO L226 Difference]: Without dead ends: 7236 [2022-01-28 15:58:28,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4473 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1867, Invalid=10343, Unknown=0, NotChecked=0, Total=12210 [2022-01-28 15:58:28,691 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 451 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:58:28,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 542 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2079 Invalid, 0 Unknown, 131 Unchecked, 1.1s Time] [2022-01-28 15:58:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2022-01-28 15:58:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 4130. [2022-01-28 15:58:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 4129 states have (on average 3.7130055703560183) internal successors, (15331), 4129 states have internal predecessors, (15331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 15331 transitions. [2022-01-28 15:58:28,789 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 15331 transitions. Word has length 26 [2022-01-28 15:58:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:58:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 15331 transitions. [2022-01-28 15:58:28,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 15331 transitions. [2022-01-28 15:58:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:58:28,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:58:28,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:58:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-28 15:58:29,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:29,012 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:58:29,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:58:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash -504115154, now seen corresponding path program 47 times [2022-01-28 15:58:29,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:58:29,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730461390] [2022-01-28 15:58:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:58:29,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:58:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:58:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:29,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:58:29,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730461390] [2022-01-28 15:58:29,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730461390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:58:29,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068852930] [2022-01-28 15:58:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:58:29,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:58:29,383 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 15:58:29,384 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 15:58:29,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:58:29,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:58:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:58:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:58:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:29,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:58:29,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 96 [2022-01-28 15:58:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:30,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:58:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:30,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:30,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:58:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 135 [2022-01-28 15:58:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:31,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068852930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:58:31,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:58:31,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:58:31,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913702057] [2022-01-28 15:58:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:58:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:58:31,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:58:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:58:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:58:31,253 INFO L87 Difference]: Start difference. First operand 4130 states and 15331 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:58:41,088 INFO L93 Difference]: Finished difference Result 9176 states and 30725 transitions. [2022-01-28 15:58:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-28 15:58:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:58:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:58:41,112 INFO L225 Difference]: With dead ends: 9176 [2022-01-28 15:58:41,113 INFO L226 Difference]: Without dead ends: 9119 [2022-01-28 15:58:41,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4748 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2815, Invalid=9617, Unknown=0, NotChecked=0, Total=12432 [2022-01-28 15:58:41,114 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 638 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:58:41,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 576 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:58:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9119 states. [2022-01-28 15:58:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9119 to 4165. [2022-01-28 15:58:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 3.7255043227665707) internal successors, (15513), 4164 states have internal predecessors, (15513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 15513 transitions. [2022-01-28 15:58:41,231 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 15513 transitions. Word has length 26 [2022-01-28 15:58:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:58:41,231 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 15513 transitions. [2022-01-28 15:58:41,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 15513 transitions. [2022-01-28 15:58:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:58:41,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:58:41,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:58:41,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 15:58:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-28 15:58:41,451 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:58:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:58:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1977255442, now seen corresponding path program 48 times [2022-01-28 15:58:41,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:58:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198206647] [2022-01-28 15:58:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:58:41,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:58:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:58:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:41,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:58:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198206647] [2022-01-28 15:58:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198206647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:58:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298687682] [2022-01-28 15:58:41,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:58:41,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:41,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:58:41,747 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 15:58:41,750 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 15:58:41,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:58:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:58:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:58:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:58:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:42,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:58:42,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 98 [2022-01-28 15:58:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:58:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:43,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:43,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:58:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 135 [2022-01-28 15:58:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298687682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:58:43,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:58:43,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:58:43,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292790384] [2022-01-28 15:58:43,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:58:43,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:58:43,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:58:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:58:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:58:43,640 INFO L87 Difference]: Start difference. First operand 4165 states and 15513 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:58:50,814 INFO L93 Difference]: Finished difference Result 7586 states and 25449 transitions. [2022-01-28 15:58:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-28 15:58:50,814 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:58:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:58:50,831 INFO L225 Difference]: With dead ends: 7586 [2022-01-28 15:58:50,831 INFO L226 Difference]: Without dead ends: 7515 [2022-01-28 15:58:50,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5009 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1786, Invalid=12020, Unknown=0, NotChecked=0, Total=13806 [2022-01-28 15:58:50,832 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 500 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:58:50,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 830 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2854 Invalid, 0 Unknown, 403 Unchecked, 1.4s Time] [2022-01-28 15:58:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7515 states. [2022-01-28 15:58:50,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7515 to 4223. [2022-01-28 15:58:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4223 states, 4222 states have (on average 3.7216958787304595) internal successors, (15713), 4222 states have internal predecessors, (15713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4223 states to 4223 states and 15713 transitions. [2022-01-28 15:58:50,951 INFO L78 Accepts]: Start accepts. Automaton has 4223 states and 15713 transitions. Word has length 26 [2022-01-28 15:58:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:58:50,951 INFO L470 AbstractCegarLoop]: Abstraction has 4223 states and 15713 transitions. [2022-01-28 15:58:50,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:58:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4223 states and 15713 transitions. [2022-01-28 15:58:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:58:50,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:58:50,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:58:50,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-28 15:58:51,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:51,171 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:58:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:58:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1397679186, now seen corresponding path program 33 times [2022-01-28 15:58:51,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:58:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100189398] [2022-01-28 15:58:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:58:51,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:58:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:58:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:51,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:58:51,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100189398] [2022-01-28 15:58:51,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100189398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:58:51,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136491436] [2022-01-28 15:58:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:58:51,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:58:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:58:51,401 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 15:58:51,439 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 15:58:51,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:58:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:58:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:58:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:58:53,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:58:53,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:58:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:58:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:53,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:58:53,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:58:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 155 [2022-01-28 15:58:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:58:58,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136491436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:58:58,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:58:58,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 15:58:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032720401] [2022-01-28 15:58:58,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:58:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:58:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:58:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:58:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:58:58,992 INFO L87 Difference]: Start difference. First operand 4223 states and 15713 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:01,199 INFO L93 Difference]: Finished difference Result 6132 states and 21455 transitions. [2022-01-28 15:59:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 15:59:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:01,211 INFO L225 Difference]: With dead ends: 6132 [2022-01-28 15:59:01,212 INFO L226 Difference]: Without dead ends: 6085 [2022-01-28 15:59:01,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=455, Invalid=2407, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:59:01,212 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 251 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:01,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 365 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1133 Invalid, 0 Unknown, 420 Unchecked, 0.6s Time] [2022-01-28 15:59:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2022-01-28 15:59:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 4296. [2022-01-28 15:59:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 3.7136204889406286) internal successors, (15950), 4295 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 15950 transitions. [2022-01-28 15:59:01,292 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 15950 transitions. Word has length 26 [2022-01-28 15:59:01,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:01,292 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 15950 transitions. [2022-01-28 15:59:01,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:01,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 15950 transitions. [2022-01-28 15:59:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:01,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:01,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:01,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-28 15:59:01,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:01,504 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash -88677284, now seen corresponding path program 34 times [2022-01-28 15:59:01,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:01,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384832452] [2022-01-28 15:59:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:01,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:01,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:01,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384832452] [2022-01-28 15:59:01,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384832452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:01,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752092693] [2022-01-28 15:59:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:59:01,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:01,716 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 15:59:01,717 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 15:59:01,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:59:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:59:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:02,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:59:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:02,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:02,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:02,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 153 [2022-01-28 15:59:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:04,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752092693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:04,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:04,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 15:59:04,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616142494] [2022-01-28 15:59:04,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:04,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:59:04,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:59:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:59:04,052 INFO L87 Difference]: Start difference. First operand 4296 states and 15950 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:07,777 INFO L93 Difference]: Finished difference Result 6578 states and 22903 transitions. [2022-01-28 15:59:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:59:07,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:07,792 INFO L225 Difference]: With dead ends: 6578 [2022-01-28 15:59:07,792 INFO L226 Difference]: Without dead ends: 6527 [2022-01-28 15:59:07,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=599, Invalid=2707, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 15:59:07,793 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 280 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:07,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 426 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 15:59:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2022-01-28 15:59:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 4287. [2022-01-28 15:59:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 3.7144190387307514) internal successors, (15920), 4286 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 15920 transitions. [2022-01-28 15:59:07,882 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 15920 transitions. Word has length 26 [2022-01-28 15:59:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 15920 transitions. [2022-01-28 15:59:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 15920 transitions. [2022-01-28 15:59:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:07,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:07,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:07,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:08,105 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,SelfDestructingSolverStorable84 [2022-01-28 15:59:08,105 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1697038762, now seen corresponding path program 35 times [2022-01-28 15:59:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553331173] [2022-01-28 15:59:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:08,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553331173] [2022-01-28 15:59:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553331173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514922090] [2022-01-28 15:59:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:59:08,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:08,281 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 15:59:08,281 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 15:59:08,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:59:08,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:08,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:59:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:08,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:59:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:09,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:09,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:09,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:09,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-28 15:59:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514922090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:10,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:59:10,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144865504] [2022-01-28 15:59:10,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:10,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:59:10,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:10,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:59:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:59:10,928 INFO L87 Difference]: Start difference. First operand 4287 states and 15920 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:21,181 INFO L93 Difference]: Finished difference Result 9106 states and 30571 transitions. [2022-01-28 15:59:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-28 15:59:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:21,201 INFO L225 Difference]: With dead ends: 9106 [2022-01-28 15:59:21,202 INFO L226 Difference]: Without dead ends: 9018 [2022-01-28 15:59:21,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4533 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2153, Invalid=10957, Unknown=0, NotChecked=0, Total=13110 [2022-01-28 15:59:21,203 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 569 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:21,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 688 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:59:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9018 states. [2022-01-28 15:59:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9018 to 4385. [2022-01-28 15:59:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 4384 states have (on average 3.7262773722627736) internal successors, (16336), 4384 states have internal predecessors, (16336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 16336 transitions. [2022-01-28 15:59:21,313 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 16336 transitions. Word has length 26 [2022-01-28 15:59:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 4385 states and 16336 transitions. [2022-01-28 15:59:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 16336 transitions. [2022-01-28 15:59:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:21,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:21,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:21,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:21,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:21,536 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 389702574, now seen corresponding path program 36 times [2022-01-28 15:59:21,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:21,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080241970] [2022-01-28 15:59:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:21,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:21,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080241970] [2022-01-28 15:59:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080241970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601420841] [2022-01-28 15:59:21,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:59:21,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:21,772 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 15:59:21,773 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 15:59:21,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:59:21,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:59:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:22,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:22,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:59:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:22,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:22,758 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:59:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 15:59:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:23,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601420841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:23,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:23,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:59:23,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912191156] [2022-01-28 15:59:23,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:23,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:59:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:59:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:59:23,877 INFO L87 Difference]: Start difference. First operand 4385 states and 16336 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:28,248 INFO L93 Difference]: Finished difference Result 7628 states and 26322 transitions. [2022-01-28 15:59:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-28 15:59:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:28,264 INFO L225 Difference]: With dead ends: 7628 [2022-01-28 15:59:28,265 INFO L226 Difference]: Without dead ends: 7583 [2022-01-28 15:59:28,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=953, Invalid=5689, Unknown=0, NotChecked=0, Total=6642 [2022-01-28 15:59:28,266 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 330 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:28,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 590 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:59:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2022-01-28 15:59:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 4387. [2022-01-28 15:59:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 4386 states have (on average 3.7254901960784315) internal successors, (16340), 4386 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 16340 transitions. [2022-01-28 15:59:28,379 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 16340 transitions. Word has length 26 [2022-01-28 15:59:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:28,379 INFO L470 AbstractCegarLoop]: Abstraction has 4387 states and 16340 transitions. [2022-01-28 15:59:28,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 16340 transitions. [2022-01-28 15:59:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:28,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:28,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:28,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:28,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:28,602 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 37 times [2022-01-28 15:59:28,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951032529] [2022-01-28 15:59:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:28,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:28,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951032529] [2022-01-28 15:59:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951032529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916365013] [2022-01-28 15:59:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:59:28,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:28,760 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 15:59:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:28,782 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 15:59:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:59:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:29,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:59:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:29,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:29,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:29,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:29,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 153 [2022-01-28 15:59:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916365013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:31,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:31,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:59:31,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426352290] [2022-01-28 15:59:31,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:31,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:59:31,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:31,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:59:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:59:31,306 INFO L87 Difference]: Start difference. First operand 4387 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:34,101 INFO L93 Difference]: Finished difference Result 6514 states and 22619 transitions. [2022-01-28 15:59:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:59:34,101 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:34,116 INFO L225 Difference]: With dead ends: 6514 [2022-01-28 15:59:34,116 INFO L226 Difference]: Without dead ends: 6427 [2022-01-28 15:59:34,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=555, Invalid=2637, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 15:59:34,117 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 277 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:34,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 341 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 15:59:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6427 states. [2022-01-28 15:59:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6427 to 4409. [2022-01-28 15:59:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.723911070780399) internal successors, (16415), 4408 states have internal predecessors, (16415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16415 transitions. [2022-01-28 15:59:34,206 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16415 transitions. Word has length 26 [2022-01-28 15:59:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 16415 transitions. [2022-01-28 15:59:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16415 transitions. [2022-01-28 15:59:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:34,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:34,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:34,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:34,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-28 15:59:34,429 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash -998969276, now seen corresponding path program 38 times [2022-01-28 15:59:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:34,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089582123] [2022-01-28 15:59:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:34,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:34,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089582123] [2022-01-28 15:59:34,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089582123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569404248] [2022-01-28 15:59:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:59:34,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:34,571 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 15:59:34,572 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 15:59:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:59:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:59:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:35,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 15:59:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:35,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:36,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:36,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 153 [2022-01-28 15:59:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569404248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:38,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:38,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:59:38,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32113605] [2022-01-28 15:59:38,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:38,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:59:38,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:38,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:59:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:59:38,733 INFO L87 Difference]: Start difference. First operand 4409 states and 16415 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:43,390 INFO L93 Difference]: Finished difference Result 7830 states and 26911 transitions. [2022-01-28 15:59:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-28 15:59:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:43,408 INFO L225 Difference]: With dead ends: 7830 [2022-01-28 15:59:43,408 INFO L226 Difference]: Without dead ends: 7733 [2022-01-28 15:59:43,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1018, Invalid=5144, Unknown=0, NotChecked=0, Total=6162 [2022-01-28 15:59:43,409 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:43,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 423 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1260 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-01-28 15:59:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2022-01-28 15:59:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 4432. [2022-01-28 15:59:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 3.7174452719476414) internal successors, (16472), 4431 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 16472 transitions. [2022-01-28 15:59:43,516 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 16472 transitions. Word has length 26 [2022-01-28 15:59:43,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:43,516 INFO L470 AbstractCegarLoop]: Abstraction has 4432 states and 16472 transitions. [2022-01-28 15:59:43,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 16472 transitions. [2022-01-28 15:59:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:43,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:43,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:43,540 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 15:59:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:43,725 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2113781654, now seen corresponding path program 39 times [2022-01-28 15:59:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:43,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531053719] [2022-01-28 15:59:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:43,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:43,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531053719] [2022-01-28 15:59:43,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531053719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:43,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656364677] [2022-01-28 15:59:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:59:43,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:43,941 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 15:59:43,941 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 15:59:43,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:59:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:59:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:46,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:46,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 15:59:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:46,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:46,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:46,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 161 [2022-01-28 15:59:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:49,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656364677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:49,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:49,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:59:49,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145939429] [2022-01-28 15:59:49,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:49,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:59:49,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:59:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:59:49,994 INFO L87 Difference]: Start difference. First operand 4432 states and 16472 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:52,603 INFO L93 Difference]: Finished difference Result 6608 states and 23029 transitions. [2022-01-28 15:59:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 15:59:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:52,617 INFO L225 Difference]: With dead ends: 6608 [2022-01-28 15:59:52,617 INFO L226 Difference]: Without dead ends: 6566 [2022-01-28 15:59:52,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=574, Invalid=2618, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 15:59:52,618 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 339 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:52,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 284 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 890 Invalid, 0 Unknown, 261 Unchecked, 0.5s Time] [2022-01-28 15:59:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2022-01-28 15:59:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 4455. [2022-01-28 15:59:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 4454 states have (on average 3.7155365963179166) internal successors, (16549), 4454 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 16549 transitions. [2022-01-28 15:59:52,708 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 16549 transitions. Word has length 26 [2022-01-28 15:59:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 4455 states and 16549 transitions. [2022-01-28 15:59:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 16549 transitions. [2022-01-28 15:59:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:52,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:52,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:52,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:52,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:52,931 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2057560584, now seen corresponding path program 40 times [2022-01-28 15:59:52,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133834341] [2022-01-28 15:59:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:52,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:53,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133834341] [2022-01-28 15:59:53,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133834341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798355072] [2022-01-28 15:59:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:59:53,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:53,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:53,140 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 15:59:53,141 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 15:59:53,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:59:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:59:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:53,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:53,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:59:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:53,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:54,299 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:59:54,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 149 [2022-01-28 15:59:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:55,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798355072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:59:55,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:59:55,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 15:59:55,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501086393] [2022-01-28 15:59:55,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:59:55,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:59:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:59:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:59:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:59:55,527 INFO L87 Difference]: Start difference. First operand 4455 states and 16549 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:59:58,455 INFO L93 Difference]: Finished difference Result 7456 states and 25918 transitions. [2022-01-28 15:59:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 15:59:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 15:59:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:59:58,472 INFO L225 Difference]: With dead ends: 7456 [2022-01-28 15:59:58,472 INFO L226 Difference]: Without dead ends: 7418 [2022-01-28 15:59:58,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=817, Invalid=4153, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 15:59:58,473 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 379 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:59:58,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 352 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 15:59:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2022-01-28 15:59:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 4471. [2022-01-28 15:59:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4470 states have (on average 3.7156599552572707) internal successors, (16609), 4470 states have internal predecessors, (16609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 16609 transitions. [2022-01-28 15:59:58,580 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 16609 transitions. Word has length 26 [2022-01-28 15:59:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:59:58,581 INFO L470 AbstractCegarLoop]: Abstraction has 4471 states and 16609 transitions. [2022-01-28 15:59:58,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:59:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 16609 transitions. [2022-01-28 15:59:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 15:59:58,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:59:58,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:59:58,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-28 15:59:58,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:58,804 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:59:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:59:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1578079658, now seen corresponding path program 41 times [2022-01-28 15:59:58,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:59:58,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578243562] [2022-01-28 15:59:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:59:58,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:59:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:59:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:58,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:59:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578243562] [2022-01-28 15:59:58,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578243562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:59:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48182600] [2022-01-28 15:59:58,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:59:58,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:59:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:59:58,956 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 15:59:58,958 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 15:59:58,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:59:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:59:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:59:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:59:59,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:59:59,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:59,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 15:59:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:59:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:59:59,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:59:59,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:59:59,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 153 [2022-01-28 16:00:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:01,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48182600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:00:01,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:00:01,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 16:00:01,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400852413] [2022-01-28 16:00:01,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:00:01,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:00:01,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:00:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:00:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:00:01,657 INFO L87 Difference]: Start difference. First operand 4471 states and 16609 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:00:06,872 INFO L93 Difference]: Finished difference Result 7385 states and 25410 transitions. [2022-01-28 16:00:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-28 16:00:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:00:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:00:06,888 INFO L225 Difference]: With dead ends: 7385 [2022-01-28 16:00:06,888 INFO L226 Difference]: Without dead ends: 7252 [2022-01-28 16:00:06,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1520, Invalid=7986, Unknown=0, NotChecked=0, Total=9506 [2022-01-28 16:00:06,889 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 393 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 16:00:06,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 444 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1288 Invalid, 0 Unknown, 564 Unchecked, 0.7s Time] [2022-01-28 16:00:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-01-28 16:00:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 4475. [2022-01-28 16:00:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 3.7150201162270897) internal successors, (16621), 4474 states have internal predecessors, (16621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 16621 transitions. [2022-01-28 16:00:06,980 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 16621 transitions. Word has length 26 [2022-01-28 16:00:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:00:06,980 INFO L470 AbstractCegarLoop]: Abstraction has 4475 states and 16621 transitions. [2022-01-28 16:00:06,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 16621 transitions. [2022-01-28 16:00:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:00:06,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:00:06,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:00:07,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-28 16:00:07,189 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,SelfDestructingSolverStorable91 [2022-01-28 16:00:07,190 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:00:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:00:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 42 times [2022-01-28 16:00:07,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:00:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407609382] [2022-01-28 16:00:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:00:07,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:00:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:00:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:07,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:00:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407609382] [2022-01-28 16:00:07,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407609382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:00:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072724413] [2022-01-28 16:00:07,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:00:07,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:00:07,368 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 16:00:07,368 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 16:00:07,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:00:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:00:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:00:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:00:08,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:00:08,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:08,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 16:00:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:09,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:00:09,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:00:09,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:00:09,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 163 treesize of output 137 [2022-01-28 16:00:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:11,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072724413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:00:11,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:00:11,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-28 16:00:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440139522] [2022-01-28 16:00:11,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:00:11,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 16:00:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:00:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 16:00:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-28 16:00:11,450 INFO L87 Difference]: Start difference. First operand 4475 states and 16621 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:00:19,485 INFO L93 Difference]: Finished difference Result 9607 states and 33226 transitions. [2022-01-28 16:00:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-28 16:00:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:00:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:00:19,510 INFO L225 Difference]: With dead ends: 9607 [2022-01-28 16:00:19,510 INFO L226 Difference]: Without dead ends: 9577 [2022-01-28 16:00:19,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3922 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1911, Invalid=9219, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 16:00:19,511 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 498 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 16:00:19,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 532 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1600 Invalid, 0 Unknown, 651 Unchecked, 0.9s Time] [2022-01-28 16:00:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2022-01-28 16:00:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 4557. [2022-01-28 16:00:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 3.718173836698859) internal successors, (16940), 4556 states have internal predecessors, (16940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 16940 transitions. [2022-01-28 16:00:19,634 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 16940 transitions. Word has length 26 [2022-01-28 16:00:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:00:19,634 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 16940 transitions. [2022-01-28 16:00:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 16940 transitions. [2022-01-28 16:00:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:00:19,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:00:19,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:00:19,656 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 16:00:19,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:19,851 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:00:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:00:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1955220050, now seen corresponding path program 43 times [2022-01-28 16:00:19,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:00:19,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584287616] [2022-01-28 16:00:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:00:19,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:00:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:00:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:00:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584287616] [2022-01-28 16:00:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584287616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:00:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678177760] [2022-01-28 16:00:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:00:19,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:00:19,983 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 16:00:19,984 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 16:00:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:00:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:00:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:00:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:00:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:00:20,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:00:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:00:20,727 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 16:00:20,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 16:00:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:22,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678177760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:00:22,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:00:22,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 16:00:22,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582508735] [2022-01-28 16:00:22,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:00:22,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:00:22,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:00:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:00:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:00:22,953 INFO L87 Difference]: Start difference. First operand 4557 states and 16940 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:00:28,078 INFO L93 Difference]: Finished difference Result 7998 states and 27627 transitions. [2022-01-28 16:00:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 16:00:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:00:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:00:28,097 INFO L225 Difference]: With dead ends: 7998 [2022-01-28 16:00:28,098 INFO L226 Difference]: Without dead ends: 7953 [2022-01-28 16:00:28,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=969, Invalid=5673, Unknown=0, NotChecked=0, Total=6642 [2022-01-28 16:00:28,098 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 315 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:00:28,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 391 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 16:00:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-01-28 16:00:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 4585. [2022-01-28 16:00:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4585 states, 4584 states have (on average 3.7170593368237346) internal successors, (17039), 4584 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4585 states to 4585 states and 17039 transitions. [2022-01-28 16:00:28,216 INFO L78 Accepts]: Start accepts. Automaton has 4585 states and 17039 transitions. Word has length 26 [2022-01-28 16:00:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:00:28,216 INFO L470 AbstractCegarLoop]: Abstraction has 4585 states and 17039 transitions. [2022-01-28 16:00:28,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4585 states and 17039 transitions. [2022-01-28 16:00:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:00:28,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:00:28,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:00:28,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-28 16:00:28,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:28,439 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:00:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:00:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 44 times [2022-01-28 16:00:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:00:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900792214] [2022-01-28 16:00:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:00:28,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:00:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:00:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:28,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:00:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900792214] [2022-01-28 16:00:28,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900792214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:00:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625015312] [2022-01-28 16:00:28,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:00:28,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:28,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:00:28,598 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 16:00:28,598 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 16:00:28,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:00:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:00:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:00:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:00:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:00:29,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:29,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 88 [2022-01-28 16:00:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:29,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:00:30,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 157 [2022-01-28 16:00:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625015312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:00:47,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:00:47,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 16:00:47,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289932861] [2022-01-28 16:00:47,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:00:47,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 16:00:47,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:00:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 16:00:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-01-28 16:00:47,191 INFO L87 Difference]: Start difference. First operand 4585 states and 17039 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:00:50,431 INFO L93 Difference]: Finished difference Result 6637 states and 23322 transitions. [2022-01-28 16:00:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 16:00:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:00:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:00:50,447 INFO L225 Difference]: With dead ends: 6637 [2022-01-28 16:00:50,447 INFO L226 Difference]: Without dead ends: 6561 [2022-01-28 16:00:50,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=640, Invalid=2116, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 16:00:50,448 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 16:00:50,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 232 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 604 Invalid, 0 Unknown, 291 Unchecked, 0.4s Time] [2022-01-28 16:00:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2022-01-28 16:00:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 4615. [2022-01-28 16:00:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4615 states, 4614 states have (on average 3.7143476376246207) internal successors, (17138), 4614 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 17138 transitions. [2022-01-28 16:00:50,617 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 17138 transitions. Word has length 26 [2022-01-28 16:00:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:00:50,617 INFO L470 AbstractCegarLoop]: Abstraction has 4615 states and 17138 transitions. [2022-01-28 16:00:50,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:00:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 17138 transitions. [2022-01-28 16:00:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:00:50,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:00:50,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:00:50,642 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 16:00:50,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:50,839 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:00:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:00:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 45 times [2022-01-28 16:00:50,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:00:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054930938] [2022-01-28 16:00:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:00:50,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:00:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:00:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:51,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:00:51,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054930938] [2022-01-28 16:00:51,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054930938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:00:51,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376318637] [2022-01-28 16:00:51,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:00:51,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:00:51,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:00:51,078 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 16:00:51,079 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 16:00:51,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:00:51,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:00:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:00:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:00:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:00:51,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 89 [2022-01-28 16:00:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:00:52,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:00:54,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:00:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 157 [2022-01-28 16:01:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:11,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376318637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:11,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:11,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 16:01:11,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162828876] [2022-01-28 16:01:11,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:11,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 16:01:11,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 16:01:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-28 16:01:11,864 INFO L87 Difference]: Start difference. First operand 4615 states and 17138 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:13,252 INFO L93 Difference]: Finished difference Result 6608 states and 23309 transitions. [2022-01-28 16:01:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 16:01:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:13,268 INFO L225 Difference]: With dead ends: 6608 [2022-01-28 16:01:13,268 INFO L226 Difference]: Without dead ends: 6548 [2022-01-28 16:01:13,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 16:01:13,268 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 211 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:13,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 196 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 326 Invalid, 0 Unknown, 393 Unchecked, 0.2s Time] [2022-01-28 16:01:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2022-01-28 16:01:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 4702. [2022-01-28 16:01:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4702 states, 4701 states have (on average 3.7070835992342053) internal successors, (17427), 4701 states have internal predecessors, (17427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4702 states to 4702 states and 17427 transitions. [2022-01-28 16:01:13,367 INFO L78 Accepts]: Start accepts. Automaton has 4702 states and 17427 transitions. Word has length 26 [2022-01-28 16:01:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:13,367 INFO L470 AbstractCegarLoop]: Abstraction has 4702 states and 17427 transitions. [2022-01-28 16:01:13,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4702 states and 17427 transitions. [2022-01-28 16:01:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:13,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:13,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:13,392 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 16:01:13,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:13,591 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash -920205752, now seen corresponding path program 46 times [2022-01-28 16:01:13,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:13,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639296557] [2022-01-28 16:01:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:13,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:13,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639296557] [2022-01-28 16:01:13,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639296557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:13,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034446695] [2022-01-28 16:01:13,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:01:13,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:13,831 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 16:01:13,831 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 16:01:13,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:01:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:01:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:01:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:14,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:01:14,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:01:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:14,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:15,152 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 16:01:15,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 149 [2022-01-28 16:01:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:18,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034446695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:18,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:18,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 16:01:18,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14771899] [2022-01-28 16:01:18,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:18,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:01:18,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:01:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:01:18,751 INFO L87 Difference]: Start difference. First operand 4702 states and 17427 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:20,432 INFO L93 Difference]: Finished difference Result 7147 states and 25069 transitions. [2022-01-28 16:01:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 16:01:20,433 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:20,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:20,449 INFO L225 Difference]: With dead ends: 7147 [2022-01-28 16:01:20,450 INFO L226 Difference]: Without dead ends: 7102 [2022-01-28 16:01:20,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 16:01:20,450 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 173 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:20,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 329 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1050 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-01-28 16:01:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7102 states. [2022-01-28 16:01:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7102 to 4688. [2022-01-28 16:01:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.7104757840836355) internal successors, (17391), 4687 states have internal predecessors, (17391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 17391 transitions. [2022-01-28 16:01:20,563 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 17391 transitions. Word has length 26 [2022-01-28 16:01:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:20,563 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 17391 transitions. [2022-01-28 16:01:20,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 17391 transitions. [2022-01-28 16:01:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:20,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:20,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:20,590 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 16:01:20,786 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,SelfDestructingSolverStorable96 [2022-01-28 16:01:20,787 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 47 times [2022-01-28 16:01:20,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:20,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780655399] [2022-01-28 16:01:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:20,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:21,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780655399] [2022-01-28 16:01:21,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780655399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726415838] [2022-01-28 16:01:21,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:01:21,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:21,013 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 16:01:21,013 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 16:01:21,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 16:01:21,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:01:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:01:21,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:21,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:01:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:01:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:21,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:01:21,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 225 treesize of output 177 [2022-01-28 16:01:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726415838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:24,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:24,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 16:01:24,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265186048] [2022-01-28 16:01:24,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:24,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:01:24,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:01:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:01:24,550 INFO L87 Difference]: Start difference. First operand 4688 states and 17391 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:26,862 INFO L93 Difference]: Finished difference Result 5732 states and 20418 transitions. [2022-01-28 16:01:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 16:01:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:26,877 INFO L225 Difference]: With dead ends: 5732 [2022-01-28 16:01:26,877 INFO L226 Difference]: Without dead ends: 5702 [2022-01-28 16:01:26,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=475, Invalid=2831, Unknown=0, NotChecked=0, Total=3306 [2022-01-28 16:01:26,878 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 206 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:26,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 399 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 987 Invalid, 0 Unknown, 392 Unchecked, 0.5s Time] [2022-01-28 16:01:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5702 states. [2022-01-28 16:01:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5702 to 4720. [2022-01-28 16:01:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4720 states, 4719 states have (on average 3.706505615596525) internal successors, (17491), 4719 states have internal predecessors, (17491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4720 states to 4720 states and 17491 transitions. [2022-01-28 16:01:27,027 INFO L78 Accepts]: Start accepts. Automaton has 4720 states and 17491 transitions. Word has length 26 [2022-01-28 16:01:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:27,027 INFO L470 AbstractCegarLoop]: Abstraction has 4720 states and 17491 transitions. [2022-01-28 16:01:27,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4720 states and 17491 transitions. [2022-01-28 16:01:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:27,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:27,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:27,055 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 16:01:27,253 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,SelfDestructingSolverStorable97 [2022-01-28 16:01:27,253 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1205977450, now seen corresponding path program 48 times [2022-01-28 16:01:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:27,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737181526] [2022-01-28 16:01:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:27,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737181526] [2022-01-28 16:01:27,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737181526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827520013] [2022-01-28 16:01:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:01:27,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:27,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:27,544 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 16:01:27,546 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 16:01:27,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:01:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:01:27,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:01:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:28,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:28,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:01:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:28,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:28,762 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 16:01:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 16:01:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:30,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827520013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:30,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:30,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 16:01:30,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537292253] [2022-01-28 16:01:30,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:30,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:01:30,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:01:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:01:30,710 INFO L87 Difference]: Start difference. First operand 4720 states and 17491 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:33,405 INFO L93 Difference]: Finished difference Result 7364 states and 25688 transitions. [2022-01-28 16:01:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-28 16:01:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:33,423 INFO L225 Difference]: With dead ends: 7364 [2022-01-28 16:01:33,423 INFO L226 Difference]: Without dead ends: 7307 [2022-01-28 16:01:33,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=622, Invalid=3668, Unknown=0, NotChecked=0, Total=4290 [2022-01-28 16:01:33,424 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 316 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:33,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 372 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 16:01:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2022-01-28 16:01:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 4747. [2022-01-28 16:01:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 4746 states have (on average 3.706911083017278) internal successors, (17593), 4746 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 17593 transitions. [2022-01-28 16:01:33,519 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 17593 transitions. Word has length 26 [2022-01-28 16:01:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 4747 states and 17593 transitions. [2022-01-28 16:01:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 17593 transitions. [2022-01-28 16:01:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:33,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:33,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-28 16:01:33,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:33,743 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 49 times [2022-01-28 16:01:33,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:33,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819925341] [2022-01-28 16:01:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:33,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:33,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819925341] [2022-01-28 16:01:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819925341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085188558] [2022-01-28 16:01:33,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:01:33,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:33,982 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 16:01:33,983 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 16:01:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:01:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:34,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:34,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:01:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:34,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:01:34,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 157 [2022-01-28 16:01:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:37,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085188558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:37,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:37,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 16:01:37,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714147554] [2022-01-28 16:01:37,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:37,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 16:01:37,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 16:01:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-28 16:01:37,007 INFO L87 Difference]: Start difference. First operand 4747 states and 17593 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:38,978 INFO L93 Difference]: Finished difference Result 6743 states and 23725 transitions. [2022-01-28 16:01:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 16:01:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:38,993 INFO L225 Difference]: With dead ends: 6743 [2022-01-28 16:01:38,993 INFO L226 Difference]: Without dead ends: 6671 [2022-01-28 16:01:38,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=486, Invalid=2064, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 16:01:38,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 208 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:38,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 253 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 685 Invalid, 0 Unknown, 283 Unchecked, 0.4s Time] [2022-01-28 16:01:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2022-01-28 16:01:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4774. [2022-01-28 16:01:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4774 states, 4773 states have (on average 3.7098261051749426) internal successors, (17707), 4773 states have internal predecessors, (17707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4774 states to 4774 states and 17707 transitions. [2022-01-28 16:01:39,094 INFO L78 Accepts]: Start accepts. Automaton has 4774 states and 17707 transitions. Word has length 26 [2022-01-28 16:01:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:39,094 INFO L470 AbstractCegarLoop]: Abstraction has 4774 states and 17707 transitions. [2022-01-28 16:01:39,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4774 states and 17707 transitions. [2022-01-28 16:01:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:39,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:39,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:39,121 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 16:01:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:39,318 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1439957490, now seen corresponding path program 50 times [2022-01-28 16:01:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737650833] [2022-01-28 16:01:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:39,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:39,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737650833] [2022-01-28 16:01:39,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737650833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419402185] [2022-01-28 16:01:39,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:01:39,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:39,607 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 16:01:39,607 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 16:01:39,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:01:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:01:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:01:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:40,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 16:01:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:40,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:41,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:41,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 153 [2022-01-28 16:01:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:44,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419402185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:44,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:44,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 16:01:44,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130686082] [2022-01-28 16:01:44,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:44,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 16:01:44,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 16:01:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-28 16:01:44,074 INFO L87 Difference]: Start difference. First operand 4774 states and 17707 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:01:46,754 INFO L93 Difference]: Finished difference Result 7436 states and 26032 transitions. [2022-01-28 16:01:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 16:01:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:01:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:01:46,772 INFO L225 Difference]: With dead ends: 7436 [2022-01-28 16:01:46,773 INFO L226 Difference]: Without dead ends: 7348 [2022-01-28 16:01:46,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=684, Invalid=3348, Unknown=0, NotChecked=0, Total=4032 [2022-01-28 16:01:46,773 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 16:01:46,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 251 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 726 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-01-28 16:01:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7348 states. [2022-01-28 16:01:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7348 to 4773. [2022-01-28 16:01:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4772 states have (on average 3.7093461860854986) internal successors, (17701), 4772 states have internal predecessors, (17701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 17701 transitions. [2022-01-28 16:01:46,892 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 17701 transitions. Word has length 26 [2022-01-28 16:01:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:01:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 4773 states and 17701 transitions. [2022-01-28 16:01:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:01:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 17701 transitions. [2022-01-28 16:01:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:01:46,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:01:46,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:01:46,918 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 16:01:47,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-28 16:01:47,115 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:01:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:01:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -693546748, now seen corresponding path program 51 times [2022-01-28 16:01:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:01:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360801435] [2022-01-28 16:01:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:01:47,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:01:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:01:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:47,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:01:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360801435] [2022-01-28 16:01:47,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360801435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:01:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604593373] [2022-01-28 16:01:47,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:01:47,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:01:47,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:01:47,392 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 16:01:47,393 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 16:01:47,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:01:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:01:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:01:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:01:47,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:01:47,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:47,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2022-01-28 16:01:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:48,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:01:49,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:01:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 181 [2022-01-28 16:01:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:01:59,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604593373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:01:59,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:01:59,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 16:01:59,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246852281] [2022-01-28 16:01:59,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:01:59,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 16:01:59,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:01:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 16:01:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-28 16:01:59,419 INFO L87 Difference]: Start difference. First operand 4773 states and 17701 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:01,326 INFO L93 Difference]: Finished difference Result 6779 states and 23821 transitions. [2022-01-28 16:02:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 16:02:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:01,388 INFO L225 Difference]: With dead ends: 6779 [2022-01-28 16:02:01,388 INFO L226 Difference]: Without dead ends: 6703 [2022-01-28 16:02:01,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 16:02:01,389 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 200 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:01,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 513 Invalid, 0 Unknown, 562 Unchecked, 0.3s Time] [2022-01-28 16:02:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2022-01-28 16:02:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 4781. [2022-01-28 16:02:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4780 states have (on average 3.704602510460251) internal successors, (17708), 4780 states have internal predecessors, (17708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 17708 transitions. [2022-01-28 16:02:01,480 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 17708 transitions. Word has length 26 [2022-01-28 16:02:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:01,481 INFO L470 AbstractCegarLoop]: Abstraction has 4781 states and 17708 transitions. [2022-01-28 16:02:01,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 17708 transitions. [2022-01-28 16:02:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:01,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:01,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:01,505 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 16:02:01,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:01,705 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 52 times [2022-01-28 16:02:01,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128152618] [2022-01-28 16:02:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:01,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:01,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128152618] [2022-01-28 16:02:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128152618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930488927] [2022-01-28 16:02:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:02:01,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:01,964 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 16:02:01,964 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 16:02:01,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:02:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:02:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:02,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:02,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:02:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:03,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:03,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:03,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 173 [2022-01-28 16:02:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:05,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930488927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:05,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:05,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 16:02:05,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141336281] [2022-01-28 16:02:05,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:05,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 16:02:05,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:05,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 16:02:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-28 16:02:05,584 INFO L87 Difference]: Start difference. First operand 4781 states and 17708 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:08,454 INFO L93 Difference]: Finished difference Result 7035 states and 24649 transitions. [2022-01-28 16:02:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 16:02:08,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:08,470 INFO L225 Difference]: With dead ends: 7035 [2022-01-28 16:02:08,470 INFO L226 Difference]: Without dead ends: 6975 [2022-01-28 16:02:08,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=622, Invalid=2918, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 16:02:08,471 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 261 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 311 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 928 Invalid, 0 Unknown, 499 Unchecked, 0.6s Time] [2022-01-28 16:02:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2022-01-28 16:02:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 4829. [2022-01-28 16:02:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 3.7029826014913008) internal successors, (17878), 4828 states have internal predecessors, (17878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 17878 transitions. [2022-01-28 16:02:08,587 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 17878 transitions. Word has length 26 [2022-01-28 16:02:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:08,587 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 17878 transitions. [2022-01-28 16:02:08,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 17878 transitions. [2022-01-28 16:02:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:08,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:08,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:08,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-28 16:02:08,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-28 16:02:08,811 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 49 times [2022-01-28 16:02:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:08,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696416926] [2022-01-28 16:02:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:08,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:08,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:08,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696416926] [2022-01-28 16:02:08,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696416926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:08,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685126328] [2022-01-28 16:02:08,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:02:08,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:08,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:08,997 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 16:02:08,998 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 16:02:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:02:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:09,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:02:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:09,942 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:02:09,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 149 [2022-01-28 16:02:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:10,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685126328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:10,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:10,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-28 16:02:10,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871946427] [2022-01-28 16:02:10,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:10,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 16:02:10,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 16:02:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-28 16:02:10,527 INFO L87 Difference]: Start difference. First operand 4829 states and 17878 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:11,789 INFO L93 Difference]: Finished difference Result 6006 states and 21227 transitions. [2022-01-28 16:02:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 16:02:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:11,802 INFO L225 Difference]: With dead ends: 6006 [2022-01-28 16:02:11,802 INFO L226 Difference]: Without dead ends: 5976 [2022-01-28 16:02:11,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 16:02:11,802 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 232 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:11,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 295 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 16:02:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-01-28 16:02:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4843. [2022-01-28 16:02:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.70239570425444) internal successors, (17927), 4842 states have internal predecessors, (17927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 17927 transitions. [2022-01-28 16:02:11,902 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 17927 transitions. Word has length 26 [2022-01-28 16:02:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:11,902 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 17927 transitions. [2022-01-28 16:02:11,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 17927 transitions. [2022-01-28 16:02:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:11,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:11,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:11,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-28 16:02:12,126 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,SelfDestructingSolverStorable103 [2022-01-28 16:02:12,126 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 50 times [2022-01-28 16:02:12,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310471701] [2022-01-28 16:02:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:12,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:12,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:12,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310471701] [2022-01-28 16:02:12,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310471701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:12,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383781712] [2022-01-28 16:02:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:02:12,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:12,432 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 16:02:12,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:02:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:12,464 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 16:02:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:02:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:02:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:13,206 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:02:13,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 141 [2022-01-28 16:02:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:13,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383781712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:13,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:13,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-28 16:02:13,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071840008] [2022-01-28 16:02:13,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:13,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 16:02:13,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 16:02:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-28 16:02:13,703 INFO L87 Difference]: Start difference. First operand 4843 states and 17927 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:15,511 INFO L93 Difference]: Finished difference Result 6271 states and 22544 transitions. [2022-01-28 16:02:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 16:02:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:15,526 INFO L225 Difference]: With dead ends: 6271 [2022-01-28 16:02:15,527 INFO L226 Difference]: Without dead ends: 6199 [2022-01-28 16:02:15,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=2100, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 16:02:15,527 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 183 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:15,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 305 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 16:02:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6199 states. [2022-01-28 16:02:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6199 to 4857. [2022-01-28 16:02:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 4856 states have (on average 3.697693574958814) internal successors, (17956), 4856 states have internal predecessors, (17956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 17956 transitions. [2022-01-28 16:02:15,628 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 17956 transitions. Word has length 26 [2022-01-28 16:02:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:15,628 INFO L470 AbstractCegarLoop]: Abstraction has 4857 states and 17956 transitions. [2022-01-28 16:02:15,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 17956 transitions. [2022-01-28 16:02:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:15,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:15,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:15,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-28 16:02:15,846 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,SelfDestructingSolverStorable104 [2022-01-28 16:02:15,846 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 51 times [2022-01-28 16:02:15,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:15,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733742917] [2022-01-28 16:02:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:15,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:16,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:16,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733742917] [2022-01-28 16:02:16,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733742917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:16,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970103391] [2022-01-28 16:02:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:02:16,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:16,075 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 16:02:16,076 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 16:02:16,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:02:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:16,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:02:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:02:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:16,706 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:02:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 141 [2022-01-28 16:02:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970103391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:17,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 16:02:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199969337] [2022-01-28 16:02:17,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:02:17,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:02:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:02:17,059 INFO L87 Difference]: Start difference. First operand 4857 states and 17956 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:18,198 INFO L93 Difference]: Finished difference Result 6286 states and 22601 transitions. [2022-01-28 16:02:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 16:02:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:18,212 INFO L225 Difference]: With dead ends: 6286 [2022-01-28 16:02:18,212 INFO L226 Difference]: Without dead ends: 6256 [2022-01-28 16:02:18,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 16:02:18,213 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:18,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 279 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 16:02:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2022-01-28 16:02:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4875. [2022-01-28 16:02:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 3.697373820270825) internal successors, (18021), 4874 states have internal predecessors, (18021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 18021 transitions. [2022-01-28 16:02:18,310 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 18021 transitions. Word has length 26 [2022-01-28 16:02:18,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:18,310 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 18021 transitions. [2022-01-28 16:02:18,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 18021 transitions. [2022-01-28 16:02:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:18,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:18,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:18,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-28 16:02:18,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:18,524 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash 247070480, now seen corresponding path program 53 times [2022-01-28 16:02:18,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:18,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531752752] [2022-01-28 16:02:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:18,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:18,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531752752] [2022-01-28 16:02:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531752752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185986034] [2022-01-28 16:02:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:02:18,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:18,818 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 16:02:18,819 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 16:02:18,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 16:02:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:02:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:19,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:19,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:02:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:19,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:19,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:19,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 199 treesize of output 165 [2022-01-28 16:02:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185986034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:23,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 16:02:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169570512] [2022-01-28 16:02:23,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 16:02:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 16:02:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-28 16:02:23,113 INFO L87 Difference]: Start difference. First operand 4875 states and 18021 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:31,033 INFO L93 Difference]: Finished difference Result 9761 states and 32918 transitions. [2022-01-28 16:02:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 16:02:31,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:31,056 INFO L225 Difference]: With dead ends: 9761 [2022-01-28 16:02:31,056 INFO L226 Difference]: Without dead ends: 9716 [2022-01-28 16:02:31,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1812, Invalid=7118, Unknown=0, NotChecked=0, Total=8930 [2022-01-28 16:02:31,057 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 630 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:31,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 594 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1285 Invalid, 0 Unknown, 1064 Unchecked, 0.8s Time] [2022-01-28 16:02:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9716 states. [2022-01-28 16:02:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9716 to 4902. [2022-01-28 16:02:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 3.7000612119975513) internal successors, (18134), 4901 states have internal predecessors, (18134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 18134 transitions. [2022-01-28 16:02:31,188 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 18134 transitions. Word has length 26 [2022-01-28 16:02:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:31,188 INFO L470 AbstractCegarLoop]: Abstraction has 4902 states and 18134 transitions. [2022-01-28 16:02:31,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 18134 transitions. [2022-01-28 16:02:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:31,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:31,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:31,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-28 16:02:31,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:31,403 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1744361864, now seen corresponding path program 54 times [2022-01-28 16:02:31,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:31,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256358659] [2022-01-28 16:02:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:31,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:31,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256358659] [2022-01-28 16:02:31,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256358659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471266438] [2022-01-28 16:02:31,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:02:31,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:31,716 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 16:02:31,716 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 16:02:31,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:02:31,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 16:02:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:32,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:32,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:02:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:32,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:32,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:32,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-01-28 16:02:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:33,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471266438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:33,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:33,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-28 16:02:33,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959587967] [2022-01-28 16:02:33,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:02:33,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:02:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:02:33,304 INFO L87 Difference]: Start difference. First operand 4902 states and 18134 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:37,035 INFO L93 Difference]: Finished difference Result 8121 states and 28366 transitions. [2022-01-28 16:02:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 16:02:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:37,057 INFO L225 Difference]: With dead ends: 8121 [2022-01-28 16:02:37,057 INFO L226 Difference]: Without dead ends: 8085 [2022-01-28 16:02:37,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=797, Invalid=3759, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 16:02:37,058 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 506 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:37,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 338 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 861 Invalid, 0 Unknown, 284 Unchecked, 0.5s Time] [2022-01-28 16:02:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8085 states. [2022-01-28 16:02:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8085 to 4900. [2022-01-28 16:02:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4899 states have (on average 3.6997346397223922) internal successors, (18125), 4899 states have internal predecessors, (18125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 18125 transitions. [2022-01-28 16:02:37,174 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 18125 transitions. Word has length 26 [2022-01-28 16:02:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:37,174 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 18125 transitions. [2022-01-28 16:02:37,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 18125 transitions. [2022-01-28 16:02:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:37,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:37,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:37,199 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 16:02:37,398 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,SelfDestructingSolverStorable107 [2022-01-28 16:02:37,398 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash -318504090, now seen corresponding path program 55 times [2022-01-28 16:02:37,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:37,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772644709] [2022-01-28 16:02:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:37,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:37,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:37,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772644709] [2022-01-28 16:02:37,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772644709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:37,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457938896] [2022-01-28 16:02:37,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:02:37,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:37,736 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 16:02:37,737 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 16:02:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 16:02:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:38,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:38,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:02:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:39,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:39,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:39,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 149 [2022-01-28 16:02:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:39,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457938896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:39,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:39,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-28 16:02:39,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420972103] [2022-01-28 16:02:39,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:39,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:02:39,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:02:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:02:39,726 INFO L87 Difference]: Start difference. First operand 4900 states and 18125 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:43,480 INFO L93 Difference]: Finished difference Result 8254 states and 28750 transitions. [2022-01-28 16:02:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 16:02:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:43,499 INFO L225 Difference]: With dead ends: 8254 [2022-01-28 16:02:43,500 INFO L226 Difference]: Without dead ends: 8224 [2022-01-28 16:02:43,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2022-01-28 16:02:43,500 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 560 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:43,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 433 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1007 Invalid, 0 Unknown, 614 Unchecked, 0.6s Time] [2022-01-28 16:02:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2022-01-28 16:02:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 4891. [2022-01-28 16:02:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4890 states have (on average 3.7) internal successors, (18093), 4890 states have internal predecessors, (18093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 18093 transitions. [2022-01-28 16:02:43,618 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 18093 transitions. Word has length 26 [2022-01-28 16:02:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:43,618 INFO L470 AbstractCegarLoop]: Abstraction has 4891 states and 18093 transitions. [2022-01-28 16:02:43,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 18093 transitions. [2022-01-28 16:02:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:43,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:43,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:43,643 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 16:02:43,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:43,841 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 56 times [2022-01-28 16:02:43,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:43,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674971225] [2022-01-28 16:02:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:43,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:44,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:44,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674971225] [2022-01-28 16:02:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674971225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313604302] [2022-01-28 16:02:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:02:44,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:44,153 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 16:02:44,153 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 16:02:44,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:02:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:02:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:44,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:02:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:44,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:45,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:02:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 157 [2022-01-28 16:02:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313604302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:48,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:48,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 16:02:48,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314099884] [2022-01-28 16:02:48,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:48,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 16:02:48,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 16:02:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-28 16:02:48,451 INFO L87 Difference]: Start difference. First operand 4891 states and 18093 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:53,370 INFO L93 Difference]: Finished difference Result 9083 states and 30588 transitions. [2022-01-28 16:02:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 16:02:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:53,390 INFO L225 Difference]: With dead ends: 9083 [2022-01-28 16:02:53,390 INFO L226 Difference]: Without dead ends: 9053 [2022-01-28 16:02:53,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1138, Invalid=3974, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 16:02:53,391 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 477 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:53,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 483 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1764 Invalid, 0 Unknown, 82 Unchecked, 1.0s Time] [2022-01-28 16:02:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9053 states. [2022-01-28 16:02:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9053 to 5017. [2022-01-28 16:02:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5017 states, 5016 states have (on average 3.6981658692185007) internal successors, (18550), 5016 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5017 states to 5017 states and 18550 transitions. [2022-01-28 16:02:53,514 INFO L78 Accepts]: Start accepts. Automaton has 5017 states and 18550 transitions. Word has length 26 [2022-01-28 16:02:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:53,514 INFO L470 AbstractCegarLoop]: Abstraction has 5017 states and 18550 transitions. [2022-01-28 16:02:53,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5017 states and 18550 transitions. [2022-01-28 16:02:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:53,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:53,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:53,538 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 16:02:53,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:53,738 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:02:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:02:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 52 times [2022-01-28 16:02:53,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:02:53,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911242567] [2022-01-28 16:02:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:02:53,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:02:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:02:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:53,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:02:53,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911242567] [2022-01-28 16:02:53,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911242567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:02:53,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713277357] [2022-01-28 16:02:53,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:02:53,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:02:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:02:53,859 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 16:02:53,860 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 16:02:53,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:02:53,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:02:53,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:02:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:02:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:02:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:02:54,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 16:02:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:02:54,613 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:02:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 145 [2022-01-28 16:02:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:02:55,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713277357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:02:55,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:02:55,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-28 16:02:55,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227251019] [2022-01-28 16:02:55,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:02:55,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 16:02:55,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:02:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 16:02:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 16:02:55,106 INFO L87 Difference]: Start difference. First operand 5017 states and 18550 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:02:59,733 INFO L93 Difference]: Finished difference Result 7984 states and 27370 transitions. [2022-01-28 16:02:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-28 16:02:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:02:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:02:59,751 INFO L225 Difference]: With dead ends: 7984 [2022-01-28 16:02:59,751 INFO L226 Difference]: Without dead ends: 7954 [2022-01-28 16:02:59,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1746, Invalid=8966, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 16:02:59,752 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 380 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:02:59,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 596 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 16:02:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2022-01-28 16:02:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 5091. [2022-01-28 16:02:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5091 states, 5090 states have (on average 3.7) internal successors, (18833), 5090 states have internal predecessors, (18833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5091 states to 5091 states and 18833 transitions. [2022-01-28 16:02:59,900 INFO L78 Accepts]: Start accepts. Automaton has 5091 states and 18833 transitions. Word has length 26 [2022-01-28 16:02:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:02:59,900 INFO L470 AbstractCegarLoop]: Abstraction has 5091 states and 18833 transitions. [2022-01-28 16:02:59,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:02:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5091 states and 18833 transitions. [2022-01-28 16:02:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:02:59,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:02:59,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:02:59,927 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 16:03:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:00,115 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 57 times [2022-01-28 16:03:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898825509] [2022-01-28 16:03:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:00,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:00,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898825509] [2022-01-28 16:03:00,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898825509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900650540] [2022-01-28 16:03:00,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:03:00,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:00,370 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 16:03:00,371 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 16:03:00,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 16:03:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:03:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:00,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:00,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:03:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:01,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:01,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:01,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 165 [2022-01-28 16:03:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:04,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900650540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:04,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:04,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 16:03:04,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741994136] [2022-01-28 16:03:04,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:04,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:03:04,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:03:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:03:04,692 INFO L87 Difference]: Start difference. First operand 5091 states and 18833 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:09,606 INFO L93 Difference]: Finished difference Result 8983 states and 30326 transitions. [2022-01-28 16:03:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-28 16:03:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:09,626 INFO L225 Difference]: With dead ends: 8983 [2022-01-28 16:03:09,626 INFO L226 Difference]: Without dead ends: 8938 [2022-01-28 16:03:09,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1102, Invalid=4154, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 16:03:09,627 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 442 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:09,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 495 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1552 Invalid, 0 Unknown, 241 Unchecked, 1.0s Time] [2022-01-28 16:03:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2022-01-28 16:03:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 5072. [2022-01-28 16:03:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 5071 states have (on average 3.70143955827253) internal successors, (18770), 5071 states have internal predecessors, (18770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 18770 transitions. [2022-01-28 16:03:09,745 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 18770 transitions. Word has length 26 [2022-01-28 16:03:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:09,745 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 18770 transitions. [2022-01-28 16:03:09,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 18770 transitions. [2022-01-28 16:03:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:09,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:09,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:09,769 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 16:03:09,955 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,SelfDestructingSolverStorable111 [2022-01-28 16:03:09,955 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash -728071092, now seen corresponding path program 58 times [2022-01-28 16:03:09,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:09,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873827519] [2022-01-28 16:03:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:09,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:10,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:10,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873827519] [2022-01-28 16:03:10,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873827519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:10,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387342385] [2022-01-28 16:03:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 16:03:10,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:10,212 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 16:03:10,213 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 16:03:10,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 16:03:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:03:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:10,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:10,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:03:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:11,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 247 treesize of output 189 [2022-01-28 16:03:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387342385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:14,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:14,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 16:03:14,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038745989] [2022-01-28 16:03:14,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:14,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:03:14,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:03:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:03:14,110 INFO L87 Difference]: Start difference. First operand 5072 states and 18770 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:19,863 INFO L93 Difference]: Finished difference Result 9738 states and 32996 transitions. [2022-01-28 16:03:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 16:03:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:19,883 INFO L225 Difference]: With dead ends: 9738 [2022-01-28 16:03:19,883 INFO L226 Difference]: Without dead ends: 9708 [2022-01-28 16:03:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1288, Invalid=4874, Unknown=0, NotChecked=0, Total=6162 [2022-01-28 16:03:19,884 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 493 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 560 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1752 Invalid, 0 Unknown, 213 Unchecked, 1.0s Time] [2022-01-28 16:03:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2022-01-28 16:03:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 5094. [2022-01-28 16:03:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 3.700569408992735) internal successors, (18847), 5093 states have internal predecessors, (18847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 18847 transitions. [2022-01-28 16:03:20,031 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 18847 transitions. Word has length 26 [2022-01-28 16:03:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:20,031 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 18847 transitions. [2022-01-28 16:03:20,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 18847 transitions. [2022-01-28 16:03:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:20,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:20,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:20,054 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 16:03:20,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-28 16:03:20,254 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 53 times [2022-01-28 16:03:20,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514327766] [2022-01-28 16:03:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:20,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514327766] [2022-01-28 16:03:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514327766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100874930] [2022-01-28 16:03:20,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:03:20,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:20,371 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 16:03:20,371 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 16:03:20,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 16:03:20,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:03:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:20,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:20,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:20,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 16:03:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:20,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:21,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:21,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:21,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:21,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 143 [2022-01-28 16:03:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:21,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100874930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:21,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:21,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 16:03:21,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125046918] [2022-01-28 16:03:21,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:21,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 16:03:21,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 16:03:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-28 16:03:21,284 INFO L87 Difference]: Start difference. First operand 5094 states and 18847 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:22,889 INFO L93 Difference]: Finished difference Result 7557 states and 26389 transitions. [2022-01-28 16:03:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 16:03:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:22,903 INFO L225 Difference]: With dead ends: 7557 [2022-01-28 16:03:22,903 INFO L226 Difference]: Without dead ends: 7513 [2022-01-28 16:03:22,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=430, Invalid=1922, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 16:03:22,904 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 272 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 406 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 16:03:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7513 states. [2022-01-28 16:03:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7513 to 5184. [2022-01-28 16:03:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 5183 states have (on average 3.6980513216284003) internal successors, (19167), 5183 states have internal predecessors, (19167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 19167 transitions. [2022-01-28 16:03:23,006 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 19167 transitions. Word has length 26 [2022-01-28 16:03:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 19167 transitions. [2022-01-28 16:03:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 19167 transitions. [2022-01-28 16:03:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:23,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:23,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:23,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-28 16:03:23,229 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,SelfDestructingSolverStorable113 [2022-01-28 16:03:23,229 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 54 times [2022-01-28 16:03:23,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464927134] [2022-01-28 16:03:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:23,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:23,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464927134] [2022-01-28 16:03:23,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464927134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875968195] [2022-01-28 16:03:23,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:03:23,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:23,421 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 16:03:23,421 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 16:03:23,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 16:03:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:03:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:23,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:23,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2022-01-28 16:03:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:24,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:24,842 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:03:24,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 141 [2022-01-28 16:03:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:25,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875968195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:25,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:25,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-28 16:03:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648089963] [2022-01-28 16:03:25,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:25,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:03:25,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:03:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:03:25,459 INFO L87 Difference]: Start difference. First operand 5184 states and 19167 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:34,635 INFO L93 Difference]: Finished difference Result 10115 states and 34411 transitions. [2022-01-28 16:03:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-28 16:03:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:34,658 INFO L225 Difference]: With dead ends: 10115 [2022-01-28 16:03:34,659 INFO L226 Difference]: Without dead ends: 10074 [2022-01-28 16:03:34,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8162 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3393, Invalid=17199, Unknown=0, NotChecked=0, Total=20592 [2022-01-28 16:03:34,660 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 522 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:34,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 690 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 16:03:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2022-01-28 16:03:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 5191. [2022-01-28 16:03:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5190 states have (on average 3.7) internal successors, (19203), 5190 states have internal predecessors, (19203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 19203 transitions. [2022-01-28 16:03:34,818 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 19203 transitions. Word has length 26 [2022-01-28 16:03:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:34,819 INFO L470 AbstractCegarLoop]: Abstraction has 5191 states and 19203 transitions. [2022-01-28 16:03:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 19203 transitions. [2022-01-28 16:03:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:34,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:34,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:34,843 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 16:03:35,042 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,SelfDestructingSolverStorable114 [2022-01-28 16:03:35,043 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 59 times [2022-01-28 16:03:35,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946436809] [2022-01-28 16:03:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:35,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946436809] [2022-01-28 16:03:35,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946436809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412935096] [2022-01-28 16:03:35,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 16:03:35,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:35,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:35,336 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 16:03:35,337 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 16:03:35,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 16:03:35,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:03:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2022-01-28 16:03:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:36,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:36,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 153 [2022-01-28 16:03:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:38,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412935096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:38,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:38,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 16:03:38,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808629793] [2022-01-28 16:03:38,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:38,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 16:03:38,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 16:03:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-28 16:03:38,422 INFO L87 Difference]: Start difference. First operand 5191 states and 19203 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:43,621 INFO L93 Difference]: Finished difference Result 10531 states and 36520 transitions. [2022-01-28 16:03:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 16:03:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:43,645 INFO L225 Difference]: With dead ends: 10531 [2022-01-28 16:03:43,645 INFO L226 Difference]: Without dead ends: 10471 [2022-01-28 16:03:43,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=848, Invalid=5314, Unknown=0, NotChecked=0, Total=6162 [2022-01-28 16:03:43,646 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 371 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:43,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 400 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1142 Invalid, 0 Unknown, 435 Unchecked, 0.7s Time] [2022-01-28 16:03:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2022-01-28 16:03:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 5221. [2022-01-28 16:03:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 5220 states have (on average 3.7017241379310346) internal successors, (19323), 5220 states have internal predecessors, (19323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 19323 transitions. [2022-01-28 16:03:43,780 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 19323 transitions. Word has length 26 [2022-01-28 16:03:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:43,780 INFO L470 AbstractCegarLoop]: Abstraction has 5221 states and 19323 transitions. [2022-01-28 16:03:43,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 19323 transitions. [2022-01-28 16:03:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:43,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:43,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:43,804 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 16:03:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:44,004 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1028757270, now seen corresponding path program 60 times [2022-01-28 16:03:44,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850676972] [2022-01-28 16:03:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:44,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:44,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850676972] [2022-01-28 16:03:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850676972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551326608] [2022-01-28 16:03:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 16:03:44,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:44,294 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 16:03:44,295 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 16:03:44,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 16:03:44,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:03:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:03:44,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:44,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:44,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:44,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:03:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:45,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:45,351 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 16:03:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 [2022-01-28 16:03:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551326608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:46,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:46,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-28 16:03:46,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943148987] [2022-01-28 16:03:46,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:46,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 16:03:46,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 16:03:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 16:03:46,846 INFO L87 Difference]: Start difference. First operand 5221 states and 19323 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:03:53,475 INFO L93 Difference]: Finished difference Result 9020 states and 31034 transitions. [2022-01-28 16:03:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-28 16:03:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:03:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:03:53,495 INFO L225 Difference]: With dead ends: 9020 [2022-01-28 16:03:53,495 INFO L226 Difference]: Without dead ends: 8990 [2022-01-28 16:03:53,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1071, Invalid=6585, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 16:03:53,496 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 357 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 16:03:53,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 597 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 16:03:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8990 states. [2022-01-28 16:03:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8990 to 5223. [2022-01-28 16:03:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5223 states, 5222 states have (on average 3.6983914209115283) internal successors, (19313), 5222 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 19313 transitions. [2022-01-28 16:03:53,614 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 19313 transitions. Word has length 26 [2022-01-28 16:03:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:03:53,614 INFO L470 AbstractCegarLoop]: Abstraction has 5223 states and 19313 transitions. [2022-01-28 16:03:53,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:03:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 19313 transitions. [2022-01-28 16:03:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:03:53,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:03:53,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:03:53,638 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 16:03:53,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:53,827 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:03:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:03:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 61 times [2022-01-28 16:03:53,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:03:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353059260] [2022-01-28 16:03:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:03:53,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:03:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:54,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:03:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353059260] [2022-01-28 16:03:54,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353059260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:03:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102817844] [2022-01-28 16:03:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:03:54,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:03:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:03:54,145 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 16:03:54,145 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 16:03:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:03:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:03:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:03:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:03:54,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:03:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:55,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:03:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:03:55,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:03:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 189 [2022-01-28 16:03:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:03:59,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102817844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:03:59,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:03:59,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 16:03:59,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810078078] [2022-01-28 16:03:59,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:03:59,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:03:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:03:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:03:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:03:59,369 INFO L87 Difference]: Start difference. First operand 5223 states and 19313 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:04:03,874 INFO L93 Difference]: Finished difference Result 8874 states and 30373 transitions. [2022-01-28 16:04:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-28 16:04:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:04:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:04:03,892 INFO L225 Difference]: With dead ends: 8874 [2022-01-28 16:04:03,892 INFO L226 Difference]: Without dead ends: 8794 [2022-01-28 16:04:03,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=858, Invalid=3834, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 16:04:03,893 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 383 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 16:04:03,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 399 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1196 Invalid, 0 Unknown, 410 Unchecked, 0.7s Time] [2022-01-28 16:04:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8794 states. [2022-01-28 16:04:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8794 to 5254. [2022-01-28 16:04:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.6954121454407005) internal successors, (19412), 5253 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 19412 transitions. [2022-01-28 16:04:04,001 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 19412 transitions. Word has length 26 [2022-01-28 16:04:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:04:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 5254 states and 19412 transitions. [2022-01-28 16:04:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 19412 transitions. [2022-01-28 16:04:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:04:04,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:04:04,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:04:04,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-28 16:04:04,223 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,SelfDestructingSolverStorable117 [2022-01-28 16:04:04,223 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:04:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:04:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 55 times [2022-01-28 16:04:04,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:04:04,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52309149] [2022-01-28 16:04:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:04:04,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:04:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:04,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:04:04,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52309149] [2022-01-28 16:04:04,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52309149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:04:04,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478762798] [2022-01-28 16:04:04,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 16:04:04,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:04:04,452 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 16:04:04,452 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 16:04:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:04:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:04:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:05,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:05,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2022-01-28 16:04:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:04:05,541 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:04:05,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 145 [2022-01-28 16:04:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:06,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478762798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:04:06,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:04:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 16:04:06,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808729360] [2022-01-28 16:04:06,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:04:06,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:04:06,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:04:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:04:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:04:06,271 INFO L87 Difference]: Start difference. First operand 5254 states and 19412 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:04:11,272 INFO L93 Difference]: Finished difference Result 8110 states and 28353 transitions. [2022-01-28 16:04:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 16:04:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:04:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:04:11,290 INFO L225 Difference]: With dead ends: 8110 [2022-01-28 16:04:11,290 INFO L226 Difference]: Without dead ends: 8052 [2022-01-28 16:04:11,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1576, Invalid=7930, Unknown=0, NotChecked=0, Total=9506 [2022-01-28 16:04:11,291 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 327 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 16:04:11,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 595 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 16:04:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2022-01-28 16:04:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 5337. [2022-01-28 16:04:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 3.6845952023988007) internal successors, (19661), 5336 states have internal predecessors, (19661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 19661 transitions. [2022-01-28 16:04:11,410 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 19661 transitions. Word has length 26 [2022-01-28 16:04:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:04:11,410 INFO L470 AbstractCegarLoop]: Abstraction has 5337 states and 19661 transitions. [2022-01-28 16:04:11,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 19661 transitions. [2022-01-28 16:04:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:04:11,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:04:11,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:04:11,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-28 16:04:11,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:11,634 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:04:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:04:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 56 times [2022-01-28 16:04:11,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:04:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350210958] [2022-01-28 16:04:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:04:11,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:04:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:11,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:04:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350210958] [2022-01-28 16:04:11,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350210958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:04:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341816791] [2022-01-28 16:04:11,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:04:11,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:04:11,828 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 16:04:11,829 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 16:04:11,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:04:11,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:04:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 16:04:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:04:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:12,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 70 [2022-01-28 16:04:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:04:12,694 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:04:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 141 [2022-01-28 16:04:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341816791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:04:13,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:04:13,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-28 16:04:13,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235570306] [2022-01-28 16:04:13,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:04:13,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 16:04:13,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:04:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 16:04:13,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-28 16:04:13,123 INFO L87 Difference]: Start difference. First operand 5337 states and 19661 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:04:18,152 INFO L93 Difference]: Finished difference Result 8156 states and 28571 transitions. [2022-01-28 16:04:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 16:04:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:04:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:04:18,170 INFO L225 Difference]: With dead ends: 8156 [2022-01-28 16:04:18,171 INFO L226 Difference]: Without dead ends: 8052 [2022-01-28 16:04:18,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3832 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1736, Invalid=8770, Unknown=0, NotChecked=0, Total=10506 [2022-01-28 16:04:18,172 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 354 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 16:04:18,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 503 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1658 Invalid, 0 Unknown, 177 Unchecked, 0.7s Time] [2022-01-28 16:04:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2022-01-28 16:04:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 5355. [2022-01-28 16:04:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 5354 states have (on average 3.6843481509152034) internal successors, (19726), 5354 states have internal predecessors, (19726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 19726 transitions. [2022-01-28 16:04:18,303 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 19726 transitions. Word has length 26 [2022-01-28 16:04:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:04:18,303 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 19726 transitions. [2022-01-28 16:04:18,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 19726 transitions. [2022-01-28 16:04:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:04:18,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:04:18,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:04:18,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-28 16:04:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:18,527 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:04:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:04:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1839812408, now seen corresponding path program 57 times [2022-01-28 16:04:18,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:04:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397178420] [2022-01-28 16:04:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:04:18,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:04:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:18,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:04:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397178420] [2022-01-28 16:04:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397178420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:04:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395625925] [2022-01-28 16:04:18,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 16:04:18,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:04:18,671 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 16:04:18,671 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 16:04:18,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 16:04:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:04:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 16:04:18,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:04:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 16:04:19,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 70 [2022-01-28 16:04:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:19,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:04:19,635 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 16:04:19,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 141 [2022-01-28 16:04:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:20,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395625925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 16:04:20,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 16:04:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-28 16:04:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885623329] [2022-01-28 16:04:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 16:04:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 16:04:20,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 16:04:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 16:04:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-28 16:04:20,130 INFO L87 Difference]: Start difference. First operand 5355 states and 19726 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 16:04:26,885 INFO L93 Difference]: Finished difference Result 8470 states and 29398 transitions. [2022-01-28 16:04:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-28 16:04:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-28 16:04:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 16:04:26,903 INFO L225 Difference]: With dead ends: 8470 [2022-01-28 16:04:26,904 INFO L226 Difference]: Without dead ends: 8345 [2022-01-28 16:04:26,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3868 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1878, Invalid=9252, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 16:04:26,904 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 353 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 16:04:26,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 646 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2206 Invalid, 0 Unknown, 152 Unchecked, 1.1s Time] [2022-01-28 16:04:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2022-01-28 16:04:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 5353. [2022-01-28 16:04:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 3.678998505231689) internal successors, (19690), 5352 states have internal predecessors, (19690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 19690 transitions. [2022-01-28 16:04:27,012 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 19690 transitions. Word has length 26 [2022-01-28 16:04:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 16:04:27,012 INFO L470 AbstractCegarLoop]: Abstraction has 5353 states and 19690 transitions. [2022-01-28 16:04:27,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 16:04:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 19690 transitions. [2022-01-28 16:04:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-28 16:04:27,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 16:04:27,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 16:04:27,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-28 16:04:27,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:27,236 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 16:04:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 16:04:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 62 times [2022-01-28 16:04:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 16:04:27,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201719635] [2022-01-28 16:04:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 16:04:27,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 16:04:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 16:04:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:27,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 16:04:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201719635] [2022-01-28 16:04:27,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201719635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 16:04:27,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315931783] [2022-01-28 16:04:27,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 16:04:27,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:27,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 16:04:27,415 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 16:04:27,416 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 16:04:27,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 16:04:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 16:04:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 16:04:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 16:04:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 16:04:27,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 16:04:27,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2022-01-28 16:04:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 16:04:28,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 16:04:28,436 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 16:04:28,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 149 Received shutdown request... [2022-01-28 16:04:29,711 WARN L243 SmtUtils]: Removed 2 from assertion stack [2022-01-28 16:04:29,713 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 16:04:29,721 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 16:04:29,730 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 16:04:29,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-28 16:04:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 16:04:29,928 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 5ms.. [2022-01-28 16:04:29,929 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 16:04:29,929 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 16:04:29,930 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 16:04:29,940 INFO L732 BasicCegarLoop]: Path program histogram: [62, 57, 1, 1, 1] [2022-01-28 16:04:29,942 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 16:04:29,942 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 16:04:29,943 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 04:04:29 BasicIcfg [2022-01-28 16:04:29,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 16:04:29,943 INFO L158 Benchmark]: Toolchain (without parser) took 873387.37ms. Allocated memory was 174.1MB in the beginning and 823.1MB in the end (delta: 649.1MB). Free memory was 130.7MB in the beginning and 501.1MB in the end (delta: -370.4MB). Peak memory consumption was 521.5MB. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 174.1MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.45ms. Allocated memory is still 174.1MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 INFO L158 Benchmark]: Boogie Preprocessor took 13.30ms. Allocated memory is still 174.1MB. Free memory was 129.2MB in the beginning and 128.2MB in the end (delta: 972.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 INFO L158 Benchmark]: RCFGBuilder took 171.14ms. Allocated memory is still 174.1MB. Free memory was 128.1MB in the beginning and 118.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 INFO L158 Benchmark]: TraceAbstraction took 873173.02ms. Allocated memory was 174.1MB in the beginning and 823.1MB in the end (delta: 649.1MB). Free memory was 118.4MB in the beginning and 501.1MB in the end (delta: -382.7MB). Peak memory consumption was 508.9MB. Max. memory is 8.0GB. [2022-01-28 16:04:29,944 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 0.10ms. Allocated memory is still 174.1MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.45ms. Allocated memory is still 174.1MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.30ms. Allocated memory is still 174.1MB. Free memory was 129.2MB in the beginning and 128.2MB in the end (delta: 972.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 171.14ms. Allocated memory is still 174.1MB. Free memory was 128.1MB in the beginning and 118.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 873173.02ms. Allocated memory was 174.1MB in the beginning and 823.1MB in the end (delta: 649.1MB). Free memory was 118.4MB in the beginning and 501.1MB in the end (delta: -382.7MB). Peak memory consumption was 508.9MB. 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 5ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 5ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 5ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 873.1s, OverallIterations: 122, TraceHistogramMax: 2, PathProgramHistogramMax: 62, EmptinessCheckTime: 0.6s, AutomataDifference: 534.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47363 SdHoareTripleChecker+Valid, 84.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47363 mSDsluCounter, 45537 SdHoareTripleChecker+Invalid, 72.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 22634 IncrementalHoareTripleChecker+Unchecked, 78044 mSDsCounter, 9367 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 154956 IncrementalHoareTripleChecker+Invalid, 186957 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9367 mSolverCounterUnsat, 3883 mSDtfsCounter, 154956 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13507 GetRequests, 4424 SyntacticMatches, 245 SemanticMatches, 8838 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 333338 ImplicationChecksByTransitivity, 480.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5355occurred in iteration=120, InterpolantAutomatonStates: 7277, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.9s AutomataMinimizationTime, 121 MinimizatonAttempts, 312702 StatesRemovedByMinimization, 121 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 297.0s InterpolantComputationTime, 6026 NumberOfCodeBlocks, 6023 NumberOfCodeBlocksAsserted, 382 NumberOfCheckSat, 8653 ConstructedInterpolants, 158 QuantifiedInterpolants, 198916 SizeOfPredicates, 1365 NumberOfNonLiveVariables, 7567 ConjunctsInSsa, 2398 ConjunctsInUnsatCore, 357 InterpolantComputations, 3 PerfectInterpolantSequences, 174/2090 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