/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/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:51:29,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:51:29,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:51:29,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:51:29,237 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 [2022-02-15 13:51:29,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:51:29,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:51:29,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:51:29,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:51:29,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:51:29,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:51:29,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:51:29,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:51:29,277 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:51:29,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:51:29,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:51:29,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:51:29,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:51:29,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:51:29,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:51:29,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:51:29,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:51:29,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:51:29,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:51:29,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:51:29,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:51:29,280 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:51:29,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:51:29,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:51:29,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:51:29,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:51:29,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:51:29,487 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:51:29,491 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:51:29,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2022-02-15 13:51:29,492 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2022-02-15 13:51:29,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:51:29,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:51:29,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:51:29,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:51:29,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:51:29,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,536 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:51:29,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:51:29,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:51:29,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:51:29,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:51:29,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:51:29,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:51:29,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:51:29,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:51:29,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/1) ... [2022-02-15 13:51:29,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:51:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:29,576 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) [2022-02-15 13:51:29,588 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 [2022-02-15 13:51:29,602 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:51:29,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:51:29,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:51:29,602 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:51:29,602 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:51:29,602 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:51:29,602 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:51:29,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:51:29,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:51:29,603 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:51:29,636 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:51:29,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:51:29,687 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:51:29,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:51:29,696 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 13:51:29,698 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:51:29 BoogieIcfgContainer [2022-02-15 13:51:29,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:51:29,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:51:29,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:51:29,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:51:29,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:51:29" (1/2) ... [2022-02-15 13:51:29,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be6c3b6 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:51:29, skipping insertion in model container [2022-02-15 13:51:29,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:51:29" (2/2) ... [2022-02-15 13:51:29,719 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2022-02-15 13:51:29,722 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:51:29,722 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:51:29,722 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:51:29,722 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:51:29,740 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 13:51:29,783 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:51:29,787 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, mLazyFiniteAutomaton=false, 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 [2022-02-15 13:51:29,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 13:51:29,806 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-02-15 13:51:29,817 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:51:29,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:29,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:29,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 487242803, now seen corresponding path program 1 times [2022-02-15 13:51:29,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:29,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712889788] [2022-02-15 13:51:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:29,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:29,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:29,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712889788] [2022-02-15 13:51:29,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712889788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:51:29,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:51:29,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:51:29,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066649830] [2022-02-15 13:51:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:29,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 13:51:29,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:30,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 13:51:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:51:30,027 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:30,066 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-02-15 13:51:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 13:51:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:51:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:30,075 INFO L225 Difference]: With dead ends: 57 [2022-02-15 13:51:30,076 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 13:51:30,079 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 [2022-02-15 13:51:30,085 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:30,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 13:51:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-15 13:51:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-02-15 13:51:30,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-02-15 13:51:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:30,159 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-02-15 13:51:30,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-02-15 13:51:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:51:30,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:30,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:30,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:51:30,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1536726091, now seen corresponding path program 1 times [2022-02-15 13:51:30,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:30,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160426423] [2022-02-15 13:51:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:30,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:30,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160426423] [2022-02-15 13:51:30,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160426423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:30,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926336282] [2022-02-15 13:51:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:30,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:30,255 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) [2022-02-15 13:51:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:51:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:51:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926336282] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:30,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 13:51:30,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-02-15 13:51:30,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092855457] [2022-02-15 13:51:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:30,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:51:30,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:51:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:51:30,513 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:30,617 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-02-15 13:51:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:51:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:51:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:30,620 INFO L225 Difference]: With dead ends: 76 [2022-02-15 13:51:30,620 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 13:51:30,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:30,621 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:30,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 37 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 13:51:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-02-15 13:51:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-02-15 13:51:30,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-02-15 13:51:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:30,626 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-02-15 13:51:30,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-02-15 13:51:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:51:30,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:30,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:30,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:30,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:30,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -833920783, now seen corresponding path program 1 times [2022-02-15 13:51:30,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:30,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124990910] [2022-02-15 13:51:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:30,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:30,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124990910] [2022-02-15 13:51:30,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124990910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:51:30,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:51:30,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:51:30,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792192634] [2022-02-15 13:51:30,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:30,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:51:30,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:51:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:51:30,877 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:30,935 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-02-15 13:51:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:51:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:51:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:30,936 INFO L225 Difference]: With dead ends: 71 [2022-02-15 13:51:30,937 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 13:51:30,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:30,938 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:30,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 13:51:30,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-02-15 13:51:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-02-15 13:51:30,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-02-15 13:51:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:30,946 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-02-15 13:51:30,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-02-15 13:51:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:51:30,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:30,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:30,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:51:30,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2098848643, now seen corresponding path program 2 times [2022-02-15 13:51:30,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:30,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514988293] [2022-02-15 13:51:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:30,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:31,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514988293] [2022-02-15 13:51:31,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514988293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:51:31,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:51:31,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:51:31,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101146900] [2022-02-15 13:51:31,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:51:31,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:51:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:51:31,016 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:31,073 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-02-15 13:51:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:51:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:51:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:31,078 INFO L225 Difference]: With dead ends: 51 [2022-02-15 13:51:31,078 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 13:51:31,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:31,080 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:31,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 13:51:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-02-15 13:51:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-02-15 13:51:31,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-02-15 13:51:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-02-15 13:51:31,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-02-15 13:51:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:51:31,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:31,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:31,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 13:51:31,085 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash 812220571, now seen corresponding path program 2 times [2022-02-15 13:51:31,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:31,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805311836] [2022-02-15 13:51:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:31,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:31,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805311836] [2022-02-15 13:51:31,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805311836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:51:31,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:51:31,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:51:31,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762865396] [2022-02-15 13:51:31,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:51:31,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:51:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:51:31,122 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:31,168 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-02-15 13:51:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:51:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:51:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:31,170 INFO L225 Difference]: With dead ends: 51 [2022-02-15 13:51:31,170 INFO L226 Difference]: Without dead ends: 49 [2022-02-15 13:51:31,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:51:31,177 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:31,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-15 13:51:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-02-15 13:51:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-02-15 13:51:31,187 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-02-15 13:51:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:31,187 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-02-15 13:51:31,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-02-15 13:51:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:51:31,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:31,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:31,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 13:51:31,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:31,189 INFO L85 PathProgramCache]: Analyzing trace with hash -247842829, now seen corresponding path program 1 times [2022-02-15 13:51:31,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:31,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926634562] [2022-02-15 13:51:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:31,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:31,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926634562] [2022-02-15 13:51:31,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926634562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:31,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632495388] [2022-02-15 13:51:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:31,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:31,220 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) [2022-02-15 13:51:31,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:51:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:31,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-15 13:51:31,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 13:51:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:31,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-02-15 13:51:31,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:51:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632495388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:31,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:31,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-15 13:51:31,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516550033] [2022-02-15 13:51:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:51:31,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:51:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:51:31,360 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:31,383 INFO L93 Difference]: Finished difference Result 99 states and 186 transitions. [2022-02-15 13:51:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:51:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:51:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:31,384 INFO L225 Difference]: With dead ends: 99 [2022-02-15 13:51:31,384 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 13:51:31,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:51:31,385 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:31,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 13:51:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2022-02-15 13:51:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2022-02-15 13:51:31,389 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 18 [2022-02-15 13:51:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2022-02-15 13:51:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2022-02-15 13:51:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:51:31,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:31,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:31,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-15 13:51:31,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-02-15 13:51:31,600 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1428664589, now seen corresponding path program 2 times [2022-02-15 13:51:31,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:31,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103696900] [2022-02-15 13:51:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:31,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:31,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:31,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103696900] [2022-02-15 13:51:31,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103696900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:51:31,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:51:31,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:51:31,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583084971] [2022-02-15 13:51:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:51:31,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:51:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:51:31,626 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:31,643 INFO L93 Difference]: Finished difference Result 118 states and 233 transitions. [2022-02-15 13:51:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:51:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:51:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:31,644 INFO L225 Difference]: With dead ends: 118 [2022-02-15 13:51:31,645 INFO L226 Difference]: Without dead ends: 111 [2022-02-15 13:51:31,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:51:31,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:31,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-15 13:51:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-02-15 13:51:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 181 transitions. [2022-02-15 13:51:31,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 181 transitions. Word has length 18 [2022-02-15 13:51:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:31,650 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 181 transitions. [2022-02-15 13:51:31,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 181 transitions. [2022-02-15 13:51:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:31,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:31,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:31,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 13:51:31,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 332355189, now seen corresponding path program 3 times [2022-02-15 13:51:31,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:31,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82944403] [2022-02-15 13:51:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:31,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:31,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82944403] [2022-02-15 13:51:31,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82944403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:31,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747053280] [2022-02-15 13:51:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:31,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:31,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:31,713 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) [2022-02-15 13:51:31,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:51:31,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:51:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747053280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:31,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:31,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-15 13:51:31,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501112025] [2022-02-15 13:51:31,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:51:31,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:51:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:31,938 INFO L87 Difference]: Start difference. First operand 86 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:32,269 INFO L93 Difference]: Finished difference Result 226 states and 433 transitions. [2022-02-15 13:51:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:51:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:32,271 INFO L225 Difference]: With dead ends: 226 [2022-02-15 13:51:32,271 INFO L226 Difference]: Without dead ends: 226 [2022-02-15 13:51:32,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:51:32,271 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:32,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 107 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-15 13:51:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 88. [2022-02-15 13:51:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2022-02-15 13:51:32,277 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 20 [2022-02-15 13:51:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:32,277 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2022-02-15 13:51:32,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2022-02-15 13:51:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:32,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:32,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:32,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:32,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:32,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1418390705, now seen corresponding path program 4 times [2022-02-15 13:51:32,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:32,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774626628] [2022-02-15 13:51:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:32,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:32,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:32,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774626628] [2022-02-15 13:51:32,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774626628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:32,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786165978] [2022-02-15 13:51:32,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:32,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:32,541 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) [2022-02-15 13:51:32,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:51:32,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:32,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:32,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786165978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:32,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:32,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:51:32,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323013113] [2022-02-15 13:51:32,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:32,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:32,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:32,744 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:33,012 INFO L93 Difference]: Finished difference Result 257 states and 488 transitions. [2022-02-15 13:51:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:51:33,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:33,013 INFO L225 Difference]: With dead ends: 257 [2022-02-15 13:51:33,014 INFO L226 Difference]: Without dead ends: 234 [2022-02-15 13:51:33,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:51:33,014 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 194 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:33,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 67 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-15 13:51:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 108. [2022-02-15 13:51:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 107 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 230 transitions. [2022-02-15 13:51:33,019 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 230 transitions. Word has length 20 [2022-02-15 13:51:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:33,019 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 230 transitions. [2022-02-15 13:51:33,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 230 transitions. [2022-02-15 13:51:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:33,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:33,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:33,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:33,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:33,235 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 985887361, now seen corresponding path program 5 times [2022-02-15 13:51:33,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:33,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107699178] [2022-02-15 13:51:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:33,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:33,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107699178] [2022-02-15 13:51:33,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107699178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:33,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333855358] [2022-02-15 13:51:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:33,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:33,280 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) [2022-02-15 13:51:33,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:51:33,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:51:33,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333855358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:33,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:33,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-02-15 13:51:33,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355397770] [2022-02-15 13:51:33,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:51:33,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:51:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:33,495 INFO L87 Difference]: Start difference. First operand 108 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-02-15 13:51:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:33,796 INFO L93 Difference]: Finished difference Result 275 states and 516 transitions. [2022-02-15 13:51:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:51:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:33,797 INFO L225 Difference]: With dead ends: 275 [2022-02-15 13:51:33,797 INFO L226 Difference]: Without dead ends: 275 [2022-02-15 13:51:33,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:33,798 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 223 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:33,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 114 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-15 13:51:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 131. [2022-02-15 13:51:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.230769230769231) internal successors, (290), 130 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 290 transitions. [2022-02-15 13:51:33,803 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 290 transitions. Word has length 20 [2022-02-15 13:51:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:33,803 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 290 transitions. [2022-02-15 13:51:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-02-15 13:51:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 290 transitions. [2022-02-15 13:51:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:33,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:33,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:33,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:34,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-15 13:51:34,005 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash -398010721, now seen corresponding path program 6 times [2022-02-15 13:51:34,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:34,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040559929] [2022-02-15 13:51:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:34,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:34,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:34,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040559929] [2022-02-15 13:51:34,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040559929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:34,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140763532] [2022-02-15 13:51:34,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:34,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:34,080 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) [2022-02-15 13:51:34,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:51:34,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:51:34,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:34,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:34,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140763532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:34,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:34,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-15 13:51:34,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642353768] [2022-02-15 13:51:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:34,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:34,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:34,259 INFO L87 Difference]: Start difference. First operand 131 states and 290 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:34,489 INFO L93 Difference]: Finished difference Result 208 states and 429 transitions. [2022-02-15 13:51:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:51:34,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:34,491 INFO L225 Difference]: With dead ends: 208 [2022-02-15 13:51:34,491 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 13:51:34,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:51:34,491 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:34,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 52 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 13:51:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2022-02-15 13:51:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.212121212121212) internal successors, (292), 132 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 292 transitions. [2022-02-15 13:51:34,496 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 292 transitions. Word has length 20 [2022-02-15 13:51:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:34,496 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 292 transitions. [2022-02-15 13:51:34,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 292 transitions. [2022-02-15 13:51:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:34,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:34,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:34,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:34,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:34,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash -182759819, now seen corresponding path program 7 times [2022-02-15 13:51:34,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:34,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831245305] [2022-02-15 13:51:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:34,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:34,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:34,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831245305] [2022-02-15 13:51:34,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831245305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:34,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959686446] [2022-02-15 13:51:34,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:34,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:34,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:34,759 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) [2022-02-15 13:51:34,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:51:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:34,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:34,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959686446] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:34,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:34,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-15 13:51:34,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444358476] [2022-02-15 13:51:34,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:51:34,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:51:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:34,981 INFO L87 Difference]: Start difference. First operand 133 states and 292 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:35,332 INFO L93 Difference]: Finished difference Result 362 states and 711 transitions. [2022-02-15 13:51:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:51:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:35,334 INFO L225 Difference]: With dead ends: 362 [2022-02-15 13:51:35,334 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 13:51:35,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:51:35,335 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:35,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 95 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 13:51:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2022-02-15 13:51:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.297142857142857) internal successors, (402), 175 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 402 transitions. [2022-02-15 13:51:35,340 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 402 transitions. Word has length 20 [2022-02-15 13:51:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:35,341 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 402 transitions. [2022-02-15 13:51:35,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 402 transitions. [2022-02-15 13:51:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:35,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:35,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:35,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:35,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:35,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 520045489, now seen corresponding path program 8 times [2022-02-15 13:51:35,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:35,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172140116] [2022-02-15 13:51:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:35,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:35,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:35,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172140116] [2022-02-15 13:51:35,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172140116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:35,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92503388] [2022-02-15 13:51:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:35,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:35,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:35,603 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) [2022-02-15 13:51:35,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:51:35,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:35,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:35,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:35,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92503388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:35,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:35,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-15 13:51:35,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255375625] [2022-02-15 13:51:35,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:35,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:35,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:35,832 INFO L87 Difference]: Start difference. First operand 176 states and 402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2022-02-15 13:51:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:36,073 INFO L93 Difference]: Finished difference Result 248 states and 522 transitions. [2022-02-15 13:51:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:51:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:36,075 INFO L225 Difference]: With dead ends: 248 [2022-02-15 13:51:36,076 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 13:51:36,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:51:36,076 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:36,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 89 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 13:51:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2022-02-15 13:51:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3259668508287294) internal successors, (421), 181 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 421 transitions. [2022-02-15 13:51:36,081 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 421 transitions. Word has length 20 [2022-02-15 13:51:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:36,081 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 421 transitions. [2022-02-15 13:51:36,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2022-02-15 13:51:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 421 transitions. [2022-02-15 13:51:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:36,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:36,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:36,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-15 13:51:36,295 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,SelfDestructingSolverStorable12 [2022-02-15 13:51:36,296 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2128780453, now seen corresponding path program 9 times [2022-02-15 13:51:36,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:36,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205057731] [2022-02-15 13:51:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:36,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:36,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:36,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205057731] [2022-02-15 13:51:36,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205057731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:36,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125912039] [2022-02-15 13:51:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:36,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:36,331 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) [2022-02-15 13:51:36,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:51:36,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:51:36,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:36,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:36,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125912039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:36,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:36,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-02-15 13:51:36,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277595466] [2022-02-15 13:51:36,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:36,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:36,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:36,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:36,514 INFO L87 Difference]: Start difference. First operand 182 states and 421 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:36,787 INFO L93 Difference]: Finished difference Result 300 states and 621 transitions. [2022-02-15 13:51:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:51:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:36,788 INFO L225 Difference]: With dead ends: 300 [2022-02-15 13:51:36,789 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 13:51:36,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:36,789 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 224 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:36,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 43 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 13:51:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2022-02-15 13:51:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.314917127071823) internal successors, (419), 181 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) [2022-02-15 13:51:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 419 transitions. [2022-02-15 13:51:36,794 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 419 transitions. Word has length 20 [2022-02-15 13:51:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:36,794 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 419 transitions. [2022-02-15 13:51:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 419 transitions. [2022-02-15 13:51:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:51:36,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:36,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:36,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:37,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-15 13:51:37,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1659840577, now seen corresponding path program 10 times [2022-02-15 13:51:37,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:37,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748396259] [2022-02-15 13:51:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:37,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:37,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748396259] [2022-02-15 13:51:37,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748396259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:37,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366886487] [2022-02-15 13:51:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:37,043 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) [2022-02-15 13:51:37,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:51:37,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:51:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366886487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:37,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:37,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:51:37,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646413099] [2022-02-15 13:51:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:37,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:37,212 INFO L87 Difference]: Start difference. First operand 182 states and 419 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-02-15 13:51:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:37,444 INFO L93 Difference]: Finished difference Result 296 states and 623 transitions. [2022-02-15 13:51:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:51:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:51:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:37,445 INFO L225 Difference]: With dead ends: 296 [2022-02-15 13:51:37,445 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 13:51:37,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:51:37,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:37,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 58 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 13:51:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 193. [2022-02-15 13:51:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3125) internal successors, (444), 192 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 444 transitions. [2022-02-15 13:51:37,451 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 444 transitions. Word has length 20 [2022-02-15 13:51:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:37,451 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 444 transitions. [2022-02-15 13:51:37,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-02-15 13:51:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 444 transitions. [2022-02-15 13:51:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:51:37,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:37,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:37,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:37,659 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,SelfDestructingSolverStorable14 [2022-02-15 13:51:37,659 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash 642937523, now seen corresponding path program 11 times [2022-02-15 13:51:37,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:37,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114514550] [2022-02-15 13:51:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:37,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:37,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114514550] [2022-02-15 13:51:37,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114514550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:37,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147077695] [2022-02-15 13:51:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:37,681 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) [2022-02-15 13:51:37,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:51:37,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:51:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:51:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:37,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:37,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-02-15 13:51:37,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:37,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-15 13:51:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:37,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:37,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-02-15 13:51:37,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:37,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-15 13:51:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147077695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:37,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:37,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-02-15 13:51:37,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175908194] [2022-02-15 13:51:37,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:37,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:51:37,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:37,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:51:37,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:37,892 INFO L87 Difference]: Start difference. First operand 193 states and 444 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:37,943 INFO L93 Difference]: Finished difference Result 399 states and 869 transitions. [2022-02-15 13:51:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:51:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:37,944 INFO L225 Difference]: With dead ends: 399 [2022-02-15 13:51:37,944 INFO L226 Difference]: Without dead ends: 392 [2022-02-15 13:51:37,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:37,945 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:37,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 190 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-02-15 13:51:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-15 13:51:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2022-02-15 13:51:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.3851851851851853) internal successors, (644), 270 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 644 transitions. [2022-02-15 13:51:37,951 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 644 transitions. Word has length 22 [2022-02-15 13:51:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:37,951 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 644 transitions. [2022-02-15 13:51:37,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 644 transitions. [2022-02-15 13:51:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:51:37,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:37,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:38,168 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,SelfDestructingSolverStorable15 [2022-02-15 13:51:38,168 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:38,169 INFO L85 PathProgramCache]: Analyzing trace with hash 467064055, now seen corresponding path program 12 times [2022-02-15 13:51:38,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:38,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003918791] [2022-02-15 13:51:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:38,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:38,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:38,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003918791] [2022-02-15 13:51:38,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003918791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:38,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837380036] [2022-02-15 13:51:38,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:38,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:38,192 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) [2022-02-15 13:51:38,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:51:38,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:51:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:51:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:38,299 INFO L353 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-02-15 13:51:38,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 35 [2022-02-15 13:51:38,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:51:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:38,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:38,392 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-02-15 13:51:38,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2022-02-15 13:51:38,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-02-15 13:51:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:38,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837380036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:38,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:38,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-02-15 13:51:38,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577389810] [2022-02-15 13:51:38,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:38,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:51:38,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:51:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:51:38,421 INFO L87 Difference]: Start difference. First operand 271 states and 644 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:38,473 INFO L93 Difference]: Finished difference Result 341 states and 745 transitions. [2022-02-15 13:51:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:51:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:51:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:38,474 INFO L225 Difference]: With dead ends: 341 [2022-02-15 13:51:38,474 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 13:51:38,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:51:38,475 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:38,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 13:51:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 263. [2022-02-15 13:51:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.377862595419847) internal successors, (623), 262 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 623 transitions. [2022-02-15 13:51:38,481 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 623 transitions. Word has length 22 [2022-02-15 13:51:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 623 transitions. [2022-02-15 13:51:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 623 transitions. [2022-02-15 13:51:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:51:38,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:38,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:38,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-15 13:51:38,695 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,SelfDestructingSolverStorable16 [2022-02-15 13:51:38,695 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1436229453, now seen corresponding path program 13 times [2022-02-15 13:51:38,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:38,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750619026] [2022-02-15 13:51:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:38,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:38,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:38,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750619026] [2022-02-15 13:51:38,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750619026] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:38,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23435464] [2022-02-15 13:51:38,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:38,736 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) [2022-02-15 13:51:38,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:51:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:51:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:38,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-02-15 13:51:38,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-02-15 13:51:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:38,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:38,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-02-15 13:51:38,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:38,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-15 13:51:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:38,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23435464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:38,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:38,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-02-15 13:51:38,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268105577] [2022-02-15 13:51:38,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:38,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:51:38,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:51:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:51:38,922 INFO L87 Difference]: Start difference. First operand 263 states and 623 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:38,974 INFO L93 Difference]: Finished difference Result 443 states and 1002 transitions. [2022-02-15 13:51:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:51:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:38,976 INFO L225 Difference]: With dead ends: 443 [2022-02-15 13:51:38,976 INFO L226 Difference]: Without dead ends: 427 [2022-02-15 13:51:38,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:51:38,977 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:38,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:51:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-15 13:51:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 318. [2022-02-15 13:51:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.444794952681388) internal successors, (775), 317 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 775 transitions. [2022-02-15 13:51:38,984 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 775 transitions. Word has length 22 [2022-02-15 13:51:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 775 transitions. [2022-02-15 13:51:38,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 775 transitions. [2022-02-15 13:51:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:51:38,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:38,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:39,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:39,191 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,SelfDestructingSolverStorable17 [2022-02-15 13:51:39,191 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash -976461133, now seen corresponding path program 14 times [2022-02-15 13:51:39,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:39,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768802551] [2022-02-15 13:51:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:39,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:39,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:39,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768802551] [2022-02-15 13:51:39,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768802551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:39,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980701653] [2022-02-15 13:51:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:39,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:39,214 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) [2022-02-15 13:51:39,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:51:39,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:51:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:39,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:39,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-02-15 13:51:39,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:39,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-02-15 13:51:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:39,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:39,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:39,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-02-15 13:51:39,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:39,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-15 13:51:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:39,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980701653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:39,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:39,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-02-15 13:51:39,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731863766] [2022-02-15 13:51:39,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:39,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:51:39,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:51:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:39,383 INFO L87 Difference]: Start difference. First operand 318 states and 775 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:39,424 INFO L93 Difference]: Finished difference Result 536 states and 1220 transitions. [2022-02-15 13:51:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:51:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:39,426 INFO L225 Difference]: With dead ends: 536 [2022-02-15 13:51:39,426 INFO L226 Difference]: Without dead ends: 529 [2022-02-15 13:51:39,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:51:39,427 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:39,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-02-15 13:51:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-15 13:51:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 374. [2022-02-15 13:51:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.474530831099196) internal successors, (923), 373 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 923 transitions. [2022-02-15 13:51:39,434 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 923 transitions. Word has length 22 [2022-02-15 13:51:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:39,434 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 923 transitions. [2022-02-15 13:51:39,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 923 transitions. [2022-02-15 13:51:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:39,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:39,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:39,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:39,651 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1538228171, now seen corresponding path program 15 times [2022-02-15 13:51:39,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:39,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752214299] [2022-02-15 13:51:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:39,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:39,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:39,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752214299] [2022-02-15 13:51:39,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752214299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:39,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939812155] [2022-02-15 13:51:39,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:39,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:39,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:39,719 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) [2022-02-15 13:51:39,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:51:39,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:51:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:39,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:39,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939812155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:39,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:39,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-15 13:51:39,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735978236] [2022-02-15 13:51:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:39,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:51:39,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:51:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:51:39,959 INFO L87 Difference]: Start difference. First operand 374 states and 923 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:40,512 INFO L93 Difference]: Finished difference Result 702 states and 1541 transitions. [2022-02-15 13:51:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:51:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:40,514 INFO L225 Difference]: With dead ends: 702 [2022-02-15 13:51:40,515 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 13:51:40,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:51:40,516 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:40,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 128 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 13:51:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 325. [2022-02-15 13:51:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.450617283950617) internal successors, (794), 324 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 794 transitions. [2022-02-15 13:51:40,524 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 794 transitions. Word has length 24 [2022-02-15 13:51:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:40,525 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 794 transitions. [2022-02-15 13:51:40,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 794 transitions. [2022-02-15 13:51:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:40,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:40,526 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:40,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:40,736 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1535150223, now seen corresponding path program 16 times [2022-02-15 13:51:40,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:40,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397280241] [2022-02-15 13:51:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:40,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:40,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397280241] [2022-02-15 13:51:40,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397280241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:40,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457171486] [2022-02-15 13:51:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:40,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:40,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:40,796 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) [2022-02-15 13:51:40,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:51:40,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:40,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:40,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:41,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457171486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:41,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:41,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-15 13:51:41,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622530785] [2022-02-15 13:51:41,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:41,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:41,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:41,055 INFO L87 Difference]: Start difference. First operand 325 states and 794 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:41,598 INFO L93 Difference]: Finished difference Result 786 states and 1670 transitions. [2022-02-15 13:51:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:51:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:41,601 INFO L225 Difference]: With dead ends: 786 [2022-02-15 13:51:41,601 INFO L226 Difference]: Without dead ends: 742 [2022-02-15 13:51:41,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:51:41,602 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 300 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:41,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 127 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-02-15 13:51:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 342. [2022-02-15 13:51:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.4134897360703813) internal successors, (823), 341 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 823 transitions. [2022-02-15 13:51:41,610 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 823 transitions. Word has length 24 [2022-02-15 13:51:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:41,611 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 823 transitions. [2022-02-15 13:51:41,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 823 transitions. [2022-02-15 13:51:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:41,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:41,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:41,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:41,831 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -871610747, now seen corresponding path program 17 times [2022-02-15 13:51:41,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:41,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116280472] [2022-02-15 13:51:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:41,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:41,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:41,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116280472] [2022-02-15 13:51:41,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116280472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:41,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571054551] [2022-02-15 13:51:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:41,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:41,883 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) [2022-02-15 13:51:41,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:51:41,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:51:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:42,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:42,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571054551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:42,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:42,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-02-15 13:51:42,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422498747] [2022-02-15 13:51:42,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:42,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:51:42,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:51:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:51:42,172 INFO L87 Difference]: Start difference. First operand 342 states and 823 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-02-15 13:51:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:42,782 INFO L93 Difference]: Finished difference Result 816 states and 1756 transitions. [2022-02-15 13:51:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:51:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 [2022-02-15 13:51:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:42,785 INFO L225 Difference]: With dead ends: 816 [2022-02-15 13:51:42,785 INFO L226 Difference]: Without dead ends: 814 [2022-02-15 13:51:42,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:51:42,787 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:42,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 141 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-02-15 13:51:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 404. [2022-02-15 13:51:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.424317617866005) internal successors, (977), 403 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 977 transitions. [2022-02-15 13:51:42,796 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 977 transitions. Word has length 24 [2022-02-15 13:51:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:42,796 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 977 transitions. [2022-02-15 13:51:42,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-02-15 13:51:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 977 transitions. [2022-02-15 13:51:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:42,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:42,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:42,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:43,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:43,007 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2039458467, now seen corresponding path program 18 times [2022-02-15 13:51:43,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:43,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416788416] [2022-02-15 13:51:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:43,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:43,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:43,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416788416] [2022-02-15 13:51:43,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416788416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:43,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907362753] [2022-02-15 13:51:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:43,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:43,051 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) [2022-02-15 13:51:43,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:51:43,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:51:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:43,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:43,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:43,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907362753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:43,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:43,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-15 13:51:43,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805314944] [2022-02-15 13:51:43,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:43,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:43,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:43,322 INFO L87 Difference]: Start difference. First operand 404 states and 977 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 13:51:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:43,706 INFO L93 Difference]: Finished difference Result 548 states and 1247 transitions. [2022-02-15 13:51:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:51:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 24 [2022-02-15 13:51:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:43,708 INFO L225 Difference]: With dead ends: 548 [2022-02-15 13:51:43,708 INFO L226 Difference]: Without dead ends: 544 [2022-02-15 13:51:43,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:51:43,709 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:43,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-15 13:51:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2022-02-15 13:51:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.4218362282878414) internal successors, (976), 403 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 976 transitions. [2022-02-15 13:51:43,716 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 976 transitions. Word has length 24 [2022-02-15 13:51:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:43,716 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 976 transitions. [2022-02-15 13:51:43,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 13:51:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 976 transitions. [2022-02-15 13:51:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:43,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:43,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:43,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:43,933 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1840145777, now seen corresponding path program 19 times [2022-02-15 13:51:43,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:43,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752806414] [2022-02-15 13:51:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:43,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:43,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:43,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752806414] [2022-02-15 13:51:43,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752806414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:43,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463101320] [2022-02-15 13:51:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:43,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:43,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:43,983 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) [2022-02-15 13:51:43,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:51:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:44,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:44,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463101320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:44,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:44,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-15 13:51:44,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39563414] [2022-02-15 13:51:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:44,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:44,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:44,277 INFO L87 Difference]: Start difference. First operand 404 states and 976 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:44,652 INFO L93 Difference]: Finished difference Result 648 states and 1454 transitions. [2022-02-15 13:51:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:51:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:44,654 INFO L225 Difference]: With dead ends: 648 [2022-02-15 13:51:44,654 INFO L226 Difference]: Without dead ends: 636 [2022-02-15 13:51:44,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:51:44,655 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:44,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-15 13:51:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 426. [2022-02-15 13:51:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.4376470588235293) internal successors, (1036), 425 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1036 transitions. [2022-02-15 13:51:44,663 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1036 transitions. Word has length 24 [2022-02-15 13:51:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:44,663 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1036 transitions. [2022-02-15 13:51:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1036 transitions. [2022-02-15 13:51:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:44,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:44,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:44,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:44,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:44,880 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1315026431, now seen corresponding path program 20 times [2022-02-15 13:51:44,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:44,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292033219] [2022-02-15 13:51:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:44,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:44,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:44,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292033219] [2022-02-15 13:51:44,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292033219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:44,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108000451] [2022-02-15 13:51:44,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:44,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:44,934 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) [2022-02-15 13:51:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:51:44,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:45,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:45,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108000451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:45,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:45,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-15 13:51:45,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471518589] [2022-02-15 13:51:45,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:45,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:45,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:45,201 INFO L87 Difference]: Start difference. First operand 426 states and 1036 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:45,616 INFO L93 Difference]: Finished difference Result 690 states and 1541 transitions. [2022-02-15 13:51:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:51:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 [2022-02-15 13:51:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:45,618 INFO L225 Difference]: With dead ends: 690 [2022-02-15 13:51:45,618 INFO L226 Difference]: Without dead ends: 676 [2022-02-15 13:51:45,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:51:45,619 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:45,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 100 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-15 13:51:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 412. [2022-02-15 13:51:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.4184914841849148) internal successors, (994), 411 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) [2022-02-15 13:51:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 994 transitions. [2022-02-15 13:51:45,627 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 994 transitions. Word has length 24 [2022-02-15 13:51:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:45,627 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 994 transitions. [2022-02-15 13:51:45,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 994 transitions. [2022-02-15 13:51:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:45,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:45,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:45,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:45,844 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,SelfDestructingSolverStorable24 [2022-02-15 13:51:45,845 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1314117941, now seen corresponding path program 21 times [2022-02-15 13:51:45,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:45,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344305471] [2022-02-15 13:51:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:45,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:45,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:45,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344305471] [2022-02-15 13:51:45,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344305471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:45,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725410757] [2022-02-15 13:51:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:45,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:45,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:45,906 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) [2022-02-15 13:51:45,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:51:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:45,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:51:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:46,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725410757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:46,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:46,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-15 13:51:46,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264768344] [2022-02-15 13:51:46,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:46,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:51:46,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:51:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:51:46,171 INFO L87 Difference]: Start difference. First operand 412 states and 994 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-02-15 13:51:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:46,768 INFO L93 Difference]: Finished difference Result 858 states and 1852 transitions. [2022-02-15 13:51:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:51:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 [2022-02-15 13:51:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:46,770 INFO L225 Difference]: With dead ends: 858 [2022-02-15 13:51:46,770 INFO L226 Difference]: Without dead ends: 858 [2022-02-15 13:51:46,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:51:46,771 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:46,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 181 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-02-15 13:51:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 429. [2022-02-15 13:51:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.397196261682243) internal successors, (1026), 428 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1026 transitions. [2022-02-15 13:51:46,780 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1026 transitions. Word has length 24 [2022-02-15 13:51:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:46,780 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1026 transitions. [2022-02-15 13:51:46,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2022-02-15 13:51:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1026 transitions. [2022-02-15 13:51:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:46,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:46,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:46,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:46,999 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,SelfDestructingSolverStorable25 [2022-02-15 13:51:46,999 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1894813839, now seen corresponding path program 22 times [2022-02-15 13:51:47,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:47,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737199967] [2022-02-15 13:51:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:47,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:47,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:47,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737199967] [2022-02-15 13:51:47,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737199967] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:47,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889686965] [2022-02-15 13:51:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:47,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:47,052 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) [2022-02-15 13:51:47,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:51:47,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:47,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889686965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:47,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:47,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-15 13:51:47,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546818645] [2022-02-15 13:51:47,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:47,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:47,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:47,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:47,295 INFO L87 Difference]: Start difference. First operand 429 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:47,659 INFO L93 Difference]: Finished difference Result 588 states and 1296 transitions. [2022-02-15 13:51:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:51:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 [2022-02-15 13:51:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:47,661 INFO L225 Difference]: With dead ends: 588 [2022-02-15 13:51:47,661 INFO L226 Difference]: Without dead ends: 570 [2022-02-15 13:51:47,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:51:47,662 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:47,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 123 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-15 13:51:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 423. [2022-02-15 13:51:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.3981042654028437) internal successors, (1012), 422 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1012 transitions. [2022-02-15 13:51:47,669 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1012 transitions. Word has length 24 [2022-02-15 13:51:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1012 transitions. [2022-02-15 13:51:47,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1012 transitions. [2022-02-15 13:51:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:47,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:47,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:47,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-15 13:51:47,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-15 13:51:47,883 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 593064501, now seen corresponding path program 23 times [2022-02-15 13:51:47,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:47,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647934333] [2022-02-15 13:51:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:47,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:47,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:47,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647934333] [2022-02-15 13:51:47,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647934333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:47,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158378639] [2022-02-15 13:51:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:47,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:47,954 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) [2022-02-15 13:51:47,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:51:47,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:51:47,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:47,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:48,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:48,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158378639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:48,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:48,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-02-15 13:51:48,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857341658] [2022-02-15 13:51:48,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:48,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:51:48,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:51:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:51:48,267 INFO L87 Difference]: Start difference. First operand 423 states and 1012 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:48,984 INFO L93 Difference]: Finished difference Result 1009 states and 2226 transitions. [2022-02-15 13:51:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:51:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:48,988 INFO L225 Difference]: With dead ends: 1009 [2022-02-15 13:51:48,988 INFO L226 Difference]: Without dead ends: 1009 [2022-02-15 13:51:48,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:51:48,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 360 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:48,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 166 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-15 13:51:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 622. [2022-02-15 13:51:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4621578099838968) internal successors, (1529), 621 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1529 transitions. [2022-02-15 13:51:49,009 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1529 transitions. Word has length 24 [2022-02-15 13:51:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:49,009 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1529 transitions. [2022-02-15 13:51:49,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1529 transitions. [2022-02-15 13:51:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:49,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:49,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:49,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:49,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:49,223 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1352956133, now seen corresponding path program 24 times [2022-02-15 13:51:49,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:49,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142301821] [2022-02-15 13:51:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:49,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:49,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142301821] [2022-02-15 13:51:49,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142301821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:49,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086374697] [2022-02-15 13:51:49,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:49,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:49,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:49,276 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) [2022-02-15 13:51:49,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:51:49,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:51:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:49,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:49,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086374697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:49,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:49,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-02-15 13:51:49,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714606861] [2022-02-15 13:51:49,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:49,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:49,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:49,539 INFO L87 Difference]: Start difference. First operand 622 states and 1529 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 13:51:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:50,029 INFO L93 Difference]: Finished difference Result 871 states and 1982 transitions. [2022-02-15 13:51:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:51:50,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 24 [2022-02-15 13:51:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:50,031 INFO L225 Difference]: With dead ends: 871 [2022-02-15 13:51:50,031 INFO L226 Difference]: Without dead ends: 867 [2022-02-15 13:51:50,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:51:50,032 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 245 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:50,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 67 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-02-15 13:51:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 622. [2022-02-15 13:51:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4557165861513686) internal successors, (1525), 621 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1525 transitions. [2022-02-15 13:51:50,042 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1525 transitions. Word has length 24 [2022-02-15 13:51:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:50,042 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1525 transitions. [2022-02-15 13:51:50,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-15 13:51:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1525 transitions. [2022-02-15 13:51:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:50,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:50,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:50,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:50,255 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,SelfDestructingSolverStorable28 [2022-02-15 13:51:50,255 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1859302399, now seen corresponding path program 25 times [2022-02-15 13:51:50,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:50,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624670071] [2022-02-15 13:51:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:50,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:50,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:50,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624670071] [2022-02-15 13:51:50,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624670071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:50,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113032995] [2022-02-15 13:51:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:50,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:50,309 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) [2022-02-15 13:51:50,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:51:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:50,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:50,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113032995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:50,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:50,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-15 13:51:50,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781387770] [2022-02-15 13:51:50,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:50,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:50,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:50,553 INFO L87 Difference]: Start difference. First operand 622 states and 1525 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:51,007 INFO L93 Difference]: Finished difference Result 948 states and 2156 transitions. [2022-02-15 13:51:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 13:51:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 [2022-02-15 13:51:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:51,010 INFO L225 Difference]: With dead ends: 948 [2022-02-15 13:51:51,010 INFO L226 Difference]: Without dead ends: 936 [2022-02-15 13:51:51,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:51:51,011 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 320 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:51,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 77 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-02-15 13:51:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 675. [2022-02-15 13:51:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.4614243323442135) internal successors, (1659), 674 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1659 transitions. [2022-02-15 13:51:51,021 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1659 transitions. Word has length 24 [2022-02-15 13:51:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1659 transitions. [2022-02-15 13:51:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-02-15 13:51:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1659 transitions. [2022-02-15 13:51:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:51:51,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:51,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:51,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-15 13:51:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:51,239 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2086523779, now seen corresponding path program 26 times [2022-02-15 13:51:51,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:51,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108215905] [2022-02-15 13:51:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:51,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:51,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:51,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108215905] [2022-02-15 13:51:51,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108215905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:51,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436605052] [2022-02-15 13:51:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:51,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:51,304 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) [2022-02-15 13:51:51,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:51:51,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:51,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:51:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:51,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436605052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:51,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:51,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-15 13:51:51,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988221401] [2022-02-15 13:51:51,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:51,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:51:51,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:51,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:51:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:51:51,529 INFO L87 Difference]: Start difference. First operand 675 states and 1659 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:51,917 INFO L93 Difference]: Finished difference Result 948 states and 2180 transitions. [2022-02-15 13:51:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:51:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:51,920 INFO L225 Difference]: With dead ends: 948 [2022-02-15 13:51:51,920 INFO L226 Difference]: Without dead ends: 928 [2022-02-15 13:51:51,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 13:51:51,921 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 239 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:51,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 81 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-02-15 13:51:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 699. [2022-02-15 13:51:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.4713467048710602) internal successors, (1725), 698 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1725 transitions. [2022-02-15 13:51:51,931 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1725 transitions. Word has length 24 [2022-02-15 13:51:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1725 transitions. [2022-02-15 13:51:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1725 transitions. [2022-02-15 13:51:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:51:51,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:51,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:51,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:52,151 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,SelfDestructingSolverStorable30 [2022-02-15 13:51:52,152 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1691341709, now seen corresponding path program 27 times [2022-02-15 13:51:52,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:52,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520937091] [2022-02-15 13:51:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:52,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520937091] [2022-02-15 13:51:52,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520937091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:52,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879342116] [2022-02-15 13:51:52,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:52,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:52,175 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) [2022-02-15 13:51:52,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:51:52,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:51:52,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:51:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:52,246 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:52,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 13:51:52,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:52,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-02-15 13:51:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:52,580 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:52,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-02-15 13:51:52,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:52,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-02-15 13:51:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879342116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:52,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:52,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-02-15 13:51:52,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544851729] [2022-02-15 13:51:52,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:52,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:51:52,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:51:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:52,614 INFO L87 Difference]: Start difference. First operand 699 states and 1725 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:52,666 INFO L93 Difference]: Finished difference Result 1093 states and 2595 transitions. [2022-02-15 13:51:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:51:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:52,669 INFO L225 Difference]: With dead ends: 1093 [2022-02-15 13:51:52,669 INFO L226 Difference]: Without dead ends: 1086 [2022-02-15 13:51:52,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:52,670 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:52,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 335 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-02-15 13:51:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-02-15 13:51:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 874. [2022-02-15 13:51:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.491408934707904) internal successors, (2175), 873 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2175 transitions. [2022-02-15 13:51:52,683 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2175 transitions. Word has length 26 [2022-02-15 13:51:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 2175 transitions. [2022-02-15 13:51:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2175 transitions. [2022-02-15 13:51:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:51:52,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:52,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:52,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:52,903 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1092947383, now seen corresponding path program 28 times [2022-02-15 13:51:52,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:52,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035399498] [2022-02-15 13:51:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:52,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035399498] [2022-02-15 13:51:52,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035399498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:52,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438076781] [2022-02-15 13:51:52,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:52,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:52,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:52,949 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) [2022-02-15 13:51:52,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:51:52,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:51:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:53,019 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:53,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 13:51:53,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:53,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-02-15 13:51:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:53,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:53,403 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:53,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-02-15 13:51:53,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:53,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-02-15 13:51:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:53,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438076781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:53,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:53,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-02-15 13:51:53,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126815647] [2022-02-15 13:51:53,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:53,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:51:53,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:51:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:53,436 INFO L87 Difference]: Start difference. First operand 874 states and 2175 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:53,498 INFO L93 Difference]: Finished difference Result 1109 states and 2607 transitions. [2022-02-15 13:51:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:51:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:53,501 INFO L225 Difference]: With dead ends: 1109 [2022-02-15 13:51:53,502 INFO L226 Difference]: Without dead ends: 1106 [2022-02-15 13:51:53,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:53,502 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 90 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:53,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 352 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-02-15 13:51:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-02-15 13:51:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 910. [2022-02-15 13:51:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.5115511551155114) internal successors, (2283), 909 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2283 transitions. [2022-02-15 13:51:53,516 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2283 transitions. Word has length 26 [2022-02-15 13:51:53,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:53,516 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2283 transitions. [2022-02-15 13:51:53,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2283 transitions. [2022-02-15 13:51:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:51:53,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:53,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:53,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-15 13:51:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:53,727 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash 503132531, now seen corresponding path program 29 times [2022-02-15 13:51:53,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:53,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426731263] [2022-02-15 13:51:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:53,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:53,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:53,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426731263] [2022-02-15 13:51:53,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426731263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:53,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713554373] [2022-02-15 13:51:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:53,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:53,754 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) [2022-02-15 13:51:53,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:51:53,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:51:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:53,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 13:51:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:53,891 INFO L353 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2022-02-15 13:51:53,891 INFO L387 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2022-02-15 13:51:53,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:53,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2022-02-15 13:51:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:53,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:54,042 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:54,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2022-02-15 13:51:54,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:54,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-02-15 13:51:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:54,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713554373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:54,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:54,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-02-15 13:51:54,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190313404] [2022-02-15 13:51:54,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:54,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:51:54,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:54,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:51:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:54,078 INFO L87 Difference]: Start difference. First operand 910 states and 2283 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:54,175 INFO L93 Difference]: Finished difference Result 1218 states and 2950 transitions. [2022-02-15 13:51:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:51:54,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:54,179 INFO L225 Difference]: With dead ends: 1218 [2022-02-15 13:51:54,179 INFO L226 Difference]: Without dead ends: 1202 [2022-02-15 13:51:54,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:51:54,179 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 92 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:54,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 312 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-02-15 13:51:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1016. [2022-02-15 13:51:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.5448275862068965) internal successors, (2583), 1015 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2583 transitions. [2022-02-15 13:51:54,193 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2583 transitions. Word has length 26 [2022-02-15 13:51:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:54,193 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2583 transitions. [2022-02-15 13:51:54,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2583 transitions. [2022-02-15 13:51:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:51:54,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:54,195 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:54,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:54,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:54,401 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:54,401 INFO L85 PathProgramCache]: Analyzing trace with hash 624563315, now seen corresponding path program 30 times [2022-02-15 13:51:54,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:54,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982281636] [2022-02-15 13:51:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:54,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:54,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:54,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982281636] [2022-02-15 13:51:54,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982281636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:54,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694781917] [2022-02-15 13:51:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:54,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:54,430 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) [2022-02-15 13:51:54,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:51:54,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:51:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:51:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:54,576 INFO L353 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-02-15 13:51:54,577 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 59 [2022-02-15 13:51:54,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:54,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2022-02-15 13:51:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:54,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:54,717 INFO L353 Elim1Store]: treesize reduction 60, result has 25.9 percent of original size [2022-02-15 13:51:54,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 76 [2022-02-15 13:51:54,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:54,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2022-02-15 13:51:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:51:54,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694781917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:54,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:54,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-02-15 13:51:54,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34238845] [2022-02-15 13:51:54,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:54,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:51:54,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:51:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:54,747 INFO L87 Difference]: Start difference. First operand 1016 states and 2583 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:54,834 INFO L93 Difference]: Finished difference Result 1343 states and 3291 transitions. [2022-02-15 13:51:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:51:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:51:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:54,837 INFO L225 Difference]: With dead ends: 1343 [2022-02-15 13:51:54,837 INFO L226 Difference]: Without dead ends: 1325 [2022-02-15 13:51:54,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:51:54,838 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 133 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:54,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 295 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:51:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-02-15 13:51:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1133. [2022-02-15 13:51:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.5680212014134276) internal successors, (2907), 1132 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2907 transitions. [2022-02-15 13:51:54,854 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2907 transitions. Word has length 26 [2022-02-15 13:51:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:54,855 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2907 transitions. [2022-02-15 13:51:54,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2907 transitions. [2022-02-15 13:51:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:51:54,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:54,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:54,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:55,072 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,SelfDestructingSolverStorable34 [2022-02-15 13:51:55,072 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1355429747, now seen corresponding path program 31 times [2022-02-15 13:51:55,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:55,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098665031] [2022-02-15 13:51:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:55,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:55,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:55,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098665031] [2022-02-15 13:51:55,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098665031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:55,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159811923] [2022-02-15 13:51:55,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:55,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:55,109 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) [2022-02-15 13:51:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:51:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:51:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:55,200 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:55,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 13:51:55,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:55,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-02-15 13:51:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:55,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:55,525 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:51:55,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-02-15 13:51:55,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:55,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-02-15 13:51:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:51:55,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159811923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:55,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:55,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-02-15 13:51:55,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220365336] [2022-02-15 13:51:55,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:55,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:51:55,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:51:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:55,556 INFO L87 Difference]: Start difference. First operand 1133 states and 2907 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) [2022-02-15 13:51:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:55,615 INFO L93 Difference]: Finished difference Result 1549 states and 3837 transitions. [2022-02-15 13:51:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:51:55,615 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 26 [2022-02-15 13:51:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:55,619 INFO L225 Difference]: With dead ends: 1549 [2022-02-15 13:51:55,620 INFO L226 Difference]: Without dead ends: 1542 [2022-02-15 13:51:55,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:51:55,620 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:55,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 383 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-02-15 13:51:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-02-15 13:51:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1269. [2022-02-15 13:51:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 2.586750788643533) internal successors, (3280), 1268 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 3280 transitions. [2022-02-15 13:51:55,638 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 3280 transitions. Word has length 26 [2022-02-15 13:51:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:55,639 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 3280 transitions. [2022-02-15 13:51:55,639 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) [2022-02-15 13:51:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 3280 transitions. [2022-02-15 13:51:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:51:55,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:55,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:55,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-15 13:51:55,844 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1467504395, now seen corresponding path program 32 times [2022-02-15 13:51:55,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:55,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618616022] [2022-02-15 13:51:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:55,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:55,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:55,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618616022] [2022-02-15 13:51:55,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618616022] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:55,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206165129] [2022-02-15 13:51:55,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:55,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:55,932 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) [2022-02-15 13:51:55,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:51:55,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:55,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:51:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:56,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:56,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206165129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:56,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:56,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-02-15 13:51:56,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029374344] [2022-02-15 13:51:56,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:56,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:51:56,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:51:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:51:56,207 INFO L87 Difference]: Start difference. First operand 1269 states and 3280 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) [2022-02-15 13:51:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:57,028 INFO L93 Difference]: Finished difference Result 1911 states and 4510 transitions. [2022-02-15 13:51:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:51:57,028 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 28 [2022-02-15 13:51:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:57,032 INFO L225 Difference]: With dead ends: 1911 [2022-02-15 13:51:57,032 INFO L226 Difference]: Without dead ends: 1911 [2022-02-15 13:51:57,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:51:57,033 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:57,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 155 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-02-15 13:51:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1120. [2022-02-15 13:51:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.558534405719392) internal successors, (2863), 1119 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2863 transitions. [2022-02-15 13:51:57,050 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2863 transitions. Word has length 28 [2022-02-15 13:51:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:57,050 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 2863 transitions. [2022-02-15 13:51:57,050 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) [2022-02-15 13:51:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2863 transitions. [2022-02-15 13:51:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:51:57,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:57,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:57,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:57,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:57,263 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:57,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1490403633, now seen corresponding path program 33 times [2022-02-15 13:51:57,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:57,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984383297] [2022-02-15 13:51:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:57,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:57,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:57,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984383297] [2022-02-15 13:51:57,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984383297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:57,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947107969] [2022-02-15 13:51:57,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:57,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:57,329 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) [2022-02-15 13:51:57,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:51:57,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:51:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:51:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:57,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:57,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947107969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:57,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:57,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:51:57,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748340566] [2022-02-15 13:51:57,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:57,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:51:57,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:57,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:51:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:51:57,627 INFO L87 Difference]: Start difference. First operand 1120 states and 2863 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-02-15 13:51:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:58,494 INFO L93 Difference]: Finished difference Result 2104 states and 4847 transitions. [2022-02-15 13:51:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:51:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 28 [2022-02-15 13:51:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:58,498 INFO L225 Difference]: With dead ends: 2104 [2022-02-15 13:51:58,498 INFO L226 Difference]: Without dead ends: 2033 [2022-02-15 13:51:58,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1174, Invalid=3382, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:51:58,499 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 383 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:58,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 176 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:51:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-02-15 13:51:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1184. [2022-02-15 13:51:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.5393068469991547) internal successors, (3004), 1183 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3004 transitions. [2022-02-15 13:51:58,519 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3004 transitions. Word has length 28 [2022-02-15 13:51:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:58,519 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3004 transitions. [2022-02-15 13:51:58,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-02-15 13:51:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3004 transitions. [2022-02-15 13:51:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:51:58,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:58,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:58,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:58,737 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,SelfDestructingSolverStorable37 [2022-02-15 13:51:58,737 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1110861687, now seen corresponding path program 34 times [2022-02-15 13:51:58,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:58,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893719625] [2022-02-15 13:51:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:58,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:58,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:58,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893719625] [2022-02-15 13:51:58,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893719625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:58,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468407146] [2022-02-15 13:51:58,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:58,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:58,793 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) [2022-02-15 13:51:58,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:51:58,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:51:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:58,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:59,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468407146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:59,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:59,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-02-15 13:51:59,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168715156] [2022-02-15 13:51:59,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:59,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:51:59,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:51:59,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:51:59,122 INFO L87 Difference]: Start difference. First operand 1184 states and 3004 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) 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) [2022-02-15 13:52:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:00,189 INFO L93 Difference]: Finished difference Result 2469 states and 5839 transitions. [2022-02-15 13:52:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 13:52:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) 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 28 [2022-02-15 13:52:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:00,193 INFO L225 Difference]: With dead ends: 2469 [2022-02-15 13:52:00,193 INFO L226 Difference]: Without dead ends: 2461 [2022-02-15 13:52:00,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 13:52:00,195 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 396 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:00,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 212 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-02-15 13:52:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1466. [2022-02-15 13:52:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5419795221843002) internal successors, (3724), 1465 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3724 transitions. [2022-02-15 13:52:00,217 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3724 transitions. Word has length 28 [2022-02-15 13:52:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3724 transitions. [2022-02-15 13:52:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) 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) [2022-02-15 13:52:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3724 transitions. [2022-02-15 13:52:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:00,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:00,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:00,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-15 13:52:00,432 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,SelfDestructingSolverStorable38 [2022-02-15 13:52:00,432 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1800207527, now seen corresponding path program 35 times [2022-02-15 13:52:00,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:00,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517253493] [2022-02-15 13:52:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:00,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:00,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:00,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517253493] [2022-02-15 13:52:00,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517253493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:00,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482127540] [2022-02-15 13:52:00,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:00,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:00,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:00,486 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) [2022-02-15 13:52:00,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:52:00,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:52:00,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:00,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:00,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:00,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482127540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:00,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:00,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-15 13:52:00,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352413494] [2022-02-15 13:52:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:00,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:00,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:00,788 INFO L87 Difference]: Start difference. First operand 1466 states and 3724 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-02-15 13:52:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:01,363 INFO L93 Difference]: Finished difference Result 1722 states and 4208 transitions. [2022-02-15 13:52:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:52:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 28 [2022-02-15 13:52:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:01,366 INFO L225 Difference]: With dead ends: 1722 [2022-02-15 13:52:01,366 INFO L226 Difference]: Without dead ends: 1718 [2022-02-15 13:52:01,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:52:01,367 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 197 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:01,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 74 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-02-15 13:52:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1466. [2022-02-15 13:52:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5406143344709897) internal successors, (3722), 1465 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3722 transitions. [2022-02-15 13:52:01,384 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3722 transitions. Word has length 28 [2022-02-15 13:52:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:01,384 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3722 transitions. [2022-02-15 13:52:01,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-02-15 13:52:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3722 transitions. [2022-02-15 13:52:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:01,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:01,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:01,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:01,586 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,SelfDestructingSolverStorable39 [2022-02-15 13:52:01,587 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:01,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1551205937, now seen corresponding path program 36 times [2022-02-15 13:52:01,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:01,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940995892] [2022-02-15 13:52:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:01,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:01,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:01,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940995892] [2022-02-15 13:52:01,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940995892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:01,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816521953] [2022-02-15 13:52:01,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:01,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:01,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:01,641 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) [2022-02-15 13:52:01,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:52:01,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:52:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:01,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:01,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:01,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816521953] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:01,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:01,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-15 13:52:01,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736500318] [2022-02-15 13:52:01,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:01,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:01,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:01,983 INFO L87 Difference]: Start difference. First operand 1466 states and 3722 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2022-02-15 13:52:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:02,615 INFO L93 Difference]: Finished difference Result 2072 states and 5046 transitions. [2022-02-15 13:52:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:52:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 28 [2022-02-15 13:52:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:02,618 INFO L225 Difference]: With dead ends: 2072 [2022-02-15 13:52:02,618 INFO L226 Difference]: Without dead ends: 2057 [2022-02-15 13:52:02,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:52:02,619 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:02,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 106 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-02-15 13:52:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1512. [2022-02-15 13:52:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.545996029119788) internal successors, (3847), 1511 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 3847 transitions. [2022-02-15 13:52:02,651 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 3847 transitions. Word has length 28 [2022-02-15 13:52:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 3847 transitions. [2022-02-15 13:52:02,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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) [2022-02-15 13:52:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 3847 transitions. [2022-02-15 13:52:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:02,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:02,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:02,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:02,867 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1603966271, now seen corresponding path program 37 times [2022-02-15 13:52:02,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:02,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007390637] [2022-02-15 13:52:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:02,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:02,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:02,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007390637] [2022-02-15 13:52:02,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007390637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:02,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446825746] [2022-02-15 13:52:02,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:02,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:02,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:02,922 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) [2022-02-15 13:52:02,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:52:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:03,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:03,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446825746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:03,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:03,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-02-15 13:52:03,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962711399] [2022-02-15 13:52:03,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:03,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:03,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:03,215 INFO L87 Difference]: Start difference. First operand 1512 states and 3847 transitions. Second operand has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:03,821 INFO L93 Difference]: Finished difference Result 2028 states and 4871 transitions. [2022-02-15 13:52:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:52:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) 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 28 [2022-02-15 13:52:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:03,824 INFO L225 Difference]: With dead ends: 2028 [2022-02-15 13:52:03,824 INFO L226 Difference]: Without dead ends: 2014 [2022-02-15 13:52:03,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:52:03,825 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 290 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:03,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 112 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-02-15 13:52:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1522. [2022-02-15 13:52:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 2.544378698224852) internal successors, (3870), 1521 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 3870 transitions. [2022-02-15 13:52:03,846 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 3870 transitions. Word has length 28 [2022-02-15 13:52:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:03,846 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 3870 transitions. [2022-02-15 13:52:03,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 3870 transitions. [2022-02-15 13:52:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:03,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:03,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:03,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:04,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:04,064 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1100321219, now seen corresponding path program 38 times [2022-02-15 13:52:04,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:04,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613964054] [2022-02-15 13:52:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:04,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:04,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:04,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613964054] [2022-02-15 13:52:04,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613964054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:04,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644254184] [2022-02-15 13:52:04,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:04,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:04,138 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) [2022-02-15 13:52:04,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:52:04,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:04,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:04,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644254184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:04,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:04,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 13:52:04,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448126783] [2022-02-15 13:52:04,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:04,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:04,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:04,437 INFO L87 Difference]: Start difference. First operand 1522 states and 3870 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:05,008 INFO L93 Difference]: Finished difference Result 2204 states and 5233 transitions. [2022-02-15 13:52:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:52:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 28 [2022-02-15 13:52:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:05,012 INFO L225 Difference]: With dead ends: 2204 [2022-02-15 13:52:05,012 INFO L226 Difference]: Without dead ends: 2178 [2022-02-15 13:52:05,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:52:05,013 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:05,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 90 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-02-15 13:52:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1393. [2022-02-15 13:52:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.5229885057471266) internal successors, (3512), 1392 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 3512 transitions. [2022-02-15 13:52:05,041 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 3512 transitions. Word has length 28 [2022-02-15 13:52:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:05,042 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 3512 transitions. [2022-02-15 13:52:05,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 3512 transitions. [2022-02-15 13:52:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:05,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:05,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:05,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:05,247 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,SelfDestructingSolverStorable42 [2022-02-15 13:52:05,247 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 794141429, now seen corresponding path program 39 times [2022-02-15 13:52:05,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:05,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546954897] [2022-02-15 13:52:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:05,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:05,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:05,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546954897] [2022-02-15 13:52:05,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546954897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:05,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712571868] [2022-02-15 13:52:05,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:05,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:05,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:05,322 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) [2022-02-15 13:52:05,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:52:05,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:52:05,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:05,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:05,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:05,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712571868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:05,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:05,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:52:05,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074165159] [2022-02-15 13:52:05,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:05,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:52:05,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:52:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:52:05,645 INFO L87 Difference]: Start difference. First operand 1393 states and 3512 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) 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) [2022-02-15 13:52:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:06,521 INFO L93 Difference]: Finished difference Result 2358 states and 5365 transitions. [2022-02-15 13:52:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:52:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) 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 28 [2022-02-15 13:52:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:06,526 INFO L225 Difference]: With dead ends: 2358 [2022-02-15 13:52:06,526 INFO L226 Difference]: Without dead ends: 2358 [2022-02-15 13:52:06,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1414, Invalid=3842, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:52:06,527 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:06,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 234 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-02-15 13:52:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1209. [2022-02-15 13:52:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.4950331125827816) internal successors, (3014), 1208 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3014 transitions. [2022-02-15 13:52:06,546 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3014 transitions. Word has length 28 [2022-02-15 13:52:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:06,547 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 3014 transitions. [2022-02-15 13:52:06,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) 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) [2022-02-15 13:52:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3014 transitions. [2022-02-15 13:52:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:06,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:06,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:06,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-15 13:52:06,764 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,SelfDestructingSolverStorable43 [2022-02-15 13:52:06,764 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash 797219377, now seen corresponding path program 40 times [2022-02-15 13:52:06,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:06,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81231205] [2022-02-15 13:52:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:06,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:06,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:06,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81231205] [2022-02-15 13:52:06,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81231205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:06,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040420519] [2022-02-15 13:52:06,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:06,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:06,854 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) [2022-02-15 13:52:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:52:06,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:07,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:07,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040420519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:07,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:07,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 13:52:07,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409930768] [2022-02-15 13:52:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:07,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:07,141 INFO L87 Difference]: Start difference. First operand 1209 states and 3014 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:07,730 INFO L93 Difference]: Finished difference Result 1614 states and 3748 transitions. [2022-02-15 13:52:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:52:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 28 [2022-02-15 13:52:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:07,732 INFO L225 Difference]: With dead ends: 1614 [2022-02-15 13:52:07,733 INFO L226 Difference]: Without dead ends: 1575 [2022-02-15 13:52:07,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:52:07,733 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 264 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:07,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 152 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-02-15 13:52:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1116. [2022-02-15 13:52:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.4699551569506726) internal successors, (2754), 1115 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2754 transitions. [2022-02-15 13:52:07,748 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2754 transitions. Word has length 28 [2022-02-15 13:52:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2754 transitions. [2022-02-15 13:52:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2754 transitions. [2022-02-15 13:52:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:07,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:07,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:07,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:07,959 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,SelfDestructingSolverStorable44 [2022-02-15 13:52:07,959 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash 626662645, now seen corresponding path program 41 times [2022-02-15 13:52:07,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:07,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796267887] [2022-02-15 13:52:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:07,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:08,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:08,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796267887] [2022-02-15 13:52:08,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796267887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:08,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418276388] [2022-02-15 13:52:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:08,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:08,031 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) [2022-02-15 13:52:08,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:52:08,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:52:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:08,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:08,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418276388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:08,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:08,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-02-15 13:52:08,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014132923] [2022-02-15 13:52:08,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:08,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:52:08,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:52:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:52:08,340 INFO L87 Difference]: Start difference. First operand 1116 states and 2754 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2022-02-15 13:52:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:09,317 INFO L93 Difference]: Finished difference Result 2277 states and 5143 transitions. [2022-02-15 13:52:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:52:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 28 [2022-02-15 13:52:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:09,320 INFO L225 Difference]: With dead ends: 2277 [2022-02-15 13:52:09,320 INFO L226 Difference]: Without dead ends: 2277 [2022-02-15 13:52:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 13:52:09,321 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 236 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-02-15 13:52:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1233. [2022-02-15 13:52:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.4415584415584415) internal successors, (3008), 1232 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3008 transitions. [2022-02-15 13:52:09,340 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3008 transitions. Word has length 28 [2022-02-15 13:52:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:09,340 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 3008 transitions. [2022-02-15 13:52:09,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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) [2022-02-15 13:52:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3008 transitions. [2022-02-15 13:52:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:09,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:09,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:09,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:09,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-15 13:52:09,559 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1712698161, now seen corresponding path program 42 times [2022-02-15 13:52:09,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:09,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925870561] [2022-02-15 13:52:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:09,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:09,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:09,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925870561] [2022-02-15 13:52:09,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925870561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:09,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116271857] [2022-02-15 13:52:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:09,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:09,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:09,614 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) [2022-02-15 13:52:09,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:52:09,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:52:09,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:09,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:09,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:09,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:09,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116271857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:09,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:09,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-02-15 13:52:09,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921384541] [2022-02-15 13:52:09,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:09,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:09,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:09,904 INFO L87 Difference]: Start difference. First operand 1233 states and 3008 transitions. Second operand has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:10,459 INFO L93 Difference]: Finished difference Result 1568 states and 3646 transitions. [2022-02-15 13:52:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:52:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) 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 28 [2022-02-15 13:52:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:10,461 INFO L225 Difference]: With dead ends: 1568 [2022-02-15 13:52:10,461 INFO L226 Difference]: Without dead ends: 1550 [2022-02-15 13:52:10,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:52:10,461 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 217 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:10,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 177 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-02-15 13:52:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1261. [2022-02-15 13:52:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.447619047619048) internal successors, (3084), 1260 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3084 transitions. [2022-02-15 13:52:10,476 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3084 transitions. Word has length 28 [2022-02-15 13:52:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:10,476 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3084 transitions. [2022-02-15 13:52:10,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3084 transitions. [2022-02-15 13:52:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:10,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:10,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:10,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:10,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:10,680 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -432728331, now seen corresponding path program 43 times [2022-02-15 13:52:10,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:10,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841065010] [2022-02-15 13:52:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:10,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:10,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841065010] [2022-02-15 13:52:10,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841065010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279478978] [2022-02-15 13:52:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:10,749 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) [2022-02-15 13:52:10,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 13:52:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:10,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:10,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:10,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:11,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279478978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:11,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:11,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-02-15 13:52:11,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186830162] [2022-02-15 13:52:11,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:11,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:52:11,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:52:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:52:11,113 INFO L87 Difference]: Start difference. First operand 1261 states and 3084 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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) [2022-02-15 13:52:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:12,325 INFO L93 Difference]: Finished difference Result 2739 states and 6352 transitions. [2022-02-15 13:52:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:52:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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 28 [2022-02-15 13:52:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:12,328 INFO L225 Difference]: With dead ends: 2739 [2022-02-15 13:52:12,328 INFO L226 Difference]: Without dead ends: 2739 [2022-02-15 13:52:12,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:52:12,331 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 471 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:12,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 206 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-02-15 13:52:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1923. [2022-02-15 13:52:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.5057232049947973) internal successors, (4816), 1922 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4816 transitions. [2022-02-15 13:52:12,358 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4816 transitions. Word has length 28 [2022-02-15 13:52:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:12,358 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4816 transitions. [2022-02-15 13:52:12,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 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) [2022-02-15 13:52:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4816 transitions. [2022-02-15 13:52:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:12,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:12,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:12,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:12,571 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,SelfDestructingSolverStorable47 [2022-02-15 13:52:12,571 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1916218331, now seen corresponding path program 44 times [2022-02-15 13:52:12,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:12,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566033692] [2022-02-15 13:52:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:12,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:12,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:12,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566033692] [2022-02-15 13:52:12,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566033692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:12,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561278597] [2022-02-15 13:52:12,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:12,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:12,621 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) [2022-02-15 13:52:12,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 13:52:12,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:12,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:12,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:12,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:12,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561278597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:12,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:12,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-02-15 13:52:12,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683736325] [2022-02-15 13:52:12,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:12,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:12,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:12,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:12,932 INFO L87 Difference]: Start difference. First operand 1923 states and 4816 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-02-15 13:52:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:13,729 INFO L93 Difference]: Finished difference Result 2431 states and 5779 transitions. [2022-02-15 13:52:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:52:13,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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 28 [2022-02-15 13:52:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:13,732 INFO L225 Difference]: With dead ends: 2431 [2022-02-15 13:52:13,732 INFO L226 Difference]: Without dead ends: 2427 [2022-02-15 13:52:13,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:52:13,733 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:13,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 93 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-02-15 13:52:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1897. [2022-02-15 13:52:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 2.50210970464135) internal successors, (4744), 1896 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 4744 transitions. [2022-02-15 13:52:13,757 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 4744 transitions. Word has length 28 [2022-02-15 13:52:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:13,757 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 4744 transitions. [2022-02-15 13:52:13,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 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) [2022-02-15 13:52:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 4744 transitions. [2022-02-15 13:52:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:13,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:13,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:13,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-15 13:52:13,959 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,SelfDestructingSolverStorable48 [2022-02-15 13:52:13,960 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1409872065, now seen corresponding path program 45 times [2022-02-15 13:52:13,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:13,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662796818] [2022-02-15 13:52:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:13,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:14,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:14,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662796818] [2022-02-15 13:52:14,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662796818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:14,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231586715] [2022-02-15 13:52:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:14,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:14,025 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) [2022-02-15 13:52:14,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 13:52:14,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:52:14,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:14,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:14,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:14,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:14,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231586715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:14,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:14,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-02-15 13:52:14,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877630538] [2022-02-15 13:52:14,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:14,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:14,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:14,320 INFO L87 Difference]: Start difference. First operand 1897 states and 4744 transitions. Second operand has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:15,043 INFO L93 Difference]: Finished difference Result 2590 states and 6161 transitions. [2022-02-15 13:52:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:52:15,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) 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 28 [2022-02-15 13:52:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:15,046 INFO L225 Difference]: With dead ends: 2590 [2022-02-15 13:52:15,046 INFO L226 Difference]: Without dead ends: 2578 [2022-02-15 13:52:15,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:52:15,047 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 362 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:15,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 105 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-02-15 13:52:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2046. [2022-02-15 13:52:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.5114914425427872) internal successors, (5136), 2045 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5136 transitions. [2022-02-15 13:52:15,073 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5136 transitions. Word has length 28 [2022-02-15 13:52:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:15,073 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 5136 transitions. [2022-02-15 13:52:15,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) 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) [2022-02-15 13:52:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5136 transitions. [2022-02-15 13:52:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:15,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:15,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:15,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-15 13:52:15,276 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,SelfDestructingSolverStorable49 [2022-02-15 13:52:15,276 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1182650685, now seen corresponding path program 46 times [2022-02-15 13:52:15,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:15,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515400403] [2022-02-15 13:52:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:15,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:15,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:15,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515400403] [2022-02-15 13:52:15,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515400403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:15,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437281830] [2022-02-15 13:52:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:15,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:15,364 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) [2022-02-15 13:52:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 13:52:15,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:15,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:15,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437281830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:15,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:15,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-02-15 13:52:15,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118947868] [2022-02-15 13:52:15,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:15,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:15,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:15,665 INFO L87 Difference]: Start difference. First operand 2046 states and 5136 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:16,399 INFO L93 Difference]: Finished difference Result 2893 states and 6860 transitions. [2022-02-15 13:52:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:52:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 28 [2022-02-15 13:52:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:16,403 INFO L225 Difference]: With dead ends: 2893 [2022-02-15 13:52:16,403 INFO L226 Difference]: Without dead ends: 2873 [2022-02-15 13:52:16,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:52:16,404 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 417 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:16,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 97 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-02-15 13:52:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2276. [2022-02-15 13:52:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.514725274725275) internal successors, (5721), 2275 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5721 transitions. [2022-02-15 13:52:16,435 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5721 transitions. Word has length 28 [2022-02-15 13:52:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5721 transitions. [2022-02-15 13:52:16,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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) [2022-02-15 13:52:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5721 transitions. [2022-02-15 13:52:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 13:52:16,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:16,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:16,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:16,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:16,638 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1866236601, now seen corresponding path program 47 times [2022-02-15 13:52:16,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:16,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133495770] [2022-02-15 13:52:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:16,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133495770] [2022-02-15 13:52:16,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133495770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:16,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325913478] [2022-02-15 13:52:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:16,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:16,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:16,705 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) [2022-02-15 13:52:16,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 13:52:16,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:52:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:52:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325913478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:16,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:16,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:52:16,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872342824] [2022-02-15 13:52:16,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:16,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:52:16,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:52:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:52:16,982 INFO L87 Difference]: Start difference. First operand 2276 states and 5721 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:17,620 INFO L93 Difference]: Finished difference Result 2881 states and 6916 transitions. [2022-02-15 13:52:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:52:17,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-15 13:52:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:17,623 INFO L225 Difference]: With dead ends: 2881 [2022-02-15 13:52:17,623 INFO L226 Difference]: Without dead ends: 2853 [2022-02-15 13:52:17,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:52:17,624 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 365 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:17,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 104 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2022-02-15 13:52:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2329. [2022-02-15 13:52:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 2.527061855670103) internal successors, (5883), 2328 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 5883 transitions. [2022-02-15 13:52:17,651 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 5883 transitions. Word has length 28 [2022-02-15 13:52:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:17,651 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 5883 transitions. [2022-02-15 13:52:17,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 5883 transitions. [2022-02-15 13:52:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:17,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:17,654 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:17,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-15 13:52:17,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:17,854 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:17,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1849697587, now seen corresponding path program 48 times [2022-02-15 13:52:17,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:17,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532171607] [2022-02-15 13:52:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:17,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:17,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:17,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532171607] [2022-02-15 13:52:17,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532171607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:17,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479168082] [2022-02-15 13:52:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:17,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:17,885 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) [2022-02-15 13:52:17,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 13:52:17,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:52:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:52:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:18,142 INFO L353 Elim1Store]: treesize reduction 216, result has 25.3 percent of original size [2022-02-15 13:52:18,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 114 [2022-02-15 13:52:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:18,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:18,370 INFO L353 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2022-02-15 13:52:18,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 102 [2022-02-15 13:52:18,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:18,406 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-02-15 13:52:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:18,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479168082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:18,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:18,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-02-15 13:52:18,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658703733] [2022-02-15 13:52:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:52:18,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:52:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:52:18,446 INFO L87 Difference]: Start difference. First operand 2329 states and 5883 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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) [2022-02-15 13:52:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:18,572 INFO L93 Difference]: Finished difference Result 2886 states and 7152 transitions. [2022-02-15 13:52:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:52:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 30 [2022-02-15 13:52:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:18,575 INFO L225 Difference]: With dead ends: 2886 [2022-02-15 13:52:18,575 INFO L226 Difference]: Without dead ends: 2864 [2022-02-15 13:52:18,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:52:18,576 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 131 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:18,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 379 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:52:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-02-15 13:52:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2615. [2022-02-15 13:52:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5355776587605203) internal successors, (6628), 2614 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6628 transitions. [2022-02-15 13:52:18,607 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6628 transitions. Word has length 30 [2022-02-15 13:52:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:18,607 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 6628 transitions. [2022-02-15 13:52:18,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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) [2022-02-15 13:52:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6628 transitions. [2022-02-15 13:52:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:18,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:18,609 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:18,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-15 13:52:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:18,820 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 729678131, now seen corresponding path program 49 times [2022-02-15 13:52:18,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:18,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083859644] [2022-02-15 13:52:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:18,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:18,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:18,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083859644] [2022-02-15 13:52:18,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083859644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:18,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693087524] [2022-02-15 13:52:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:18,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:18,851 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) [2022-02-15 13:52:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 13:52:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-15 13:52:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:19,034 INFO L353 Elim1Store]: treesize reduction 118, result has 34.8 percent of original size [2022-02-15 13:52:19,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2022-02-15 13:52:19,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:19,089 INFO L387 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 93 [2022-02-15 13:52:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:19,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:19,324 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-15 13:52:19,325 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 84 [2022-02-15 13:52:19,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:19,341 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-02-15 13:52:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:19,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693087524] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:19,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:19,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-02-15 13:52:19,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672833238] [2022-02-15 13:52:19,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:19,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:52:19,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:52:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:52:19,391 INFO L87 Difference]: Start difference. First operand 2615 states and 6628 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2022-02-15 13:52:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:19,541 INFO L93 Difference]: Finished difference Result 3125 states and 7770 transitions. [2022-02-15 13:52:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:52:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 30 [2022-02-15 13:52:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:19,545 INFO L225 Difference]: With dead ends: 3125 [2022-02-15 13:52:19,545 INFO L226 Difference]: Without dead ends: 3109 [2022-02-15 13:52:19,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:52:19,545 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 131 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:19,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 494 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:52:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-02-15 13:52:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-02-15 13:52:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.5547703180212014) internal successors, (7230), 2830 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7230 transitions. [2022-02-15 13:52:19,581 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7230 transitions. Word has length 30 [2022-02-15 13:52:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 7230 transitions. [2022-02-15 13:52:19,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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) [2022-02-15 13:52:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7230 transitions. [2022-02-15 13:52:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:19,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:19,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:19,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-15 13:52:19,799 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,SelfDestructingSolverStorable53 [2022-02-15 13:52:19,799 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2126251315, now seen corresponding path program 50 times [2022-02-15 13:52:19,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:19,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263489408] [2022-02-15 13:52:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:19,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:19,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:19,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263489408] [2022-02-15 13:52:19,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263489408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:19,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080991099] [2022-02-15 13:52:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:19,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:19,831 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) [2022-02-15 13:52:19,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 13:52:19,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:19,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-15 13:52:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:20,000 INFO L353 Elim1Store]: treesize reduction 55, result has 47.6 percent of original size [2022-02-15 13:52:20,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 80 [2022-02-15 13:52:20,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:20,330 INFO L387 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-02-15 13:52:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:20,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:20,495 INFO L353 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2022-02-15 13:52:20,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 100 [2022-02-15 13:52:20,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:20,511 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 100 [2022-02-15 13:52:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:20,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080991099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:20,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:20,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2022-02-15 13:52:20,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625125937] [2022-02-15 13:52:20,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:52:20,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:52:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:52:20,559 INFO L87 Difference]: Start difference. First operand 2831 states and 7230 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:20,704 INFO L93 Difference]: Finished difference Result 3409 states and 8531 transitions. [2022-02-15 13:52:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:52:20,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:52:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:20,708 INFO L225 Difference]: With dead ends: 3409 [2022-02-15 13:52:20,708 INFO L226 Difference]: Without dead ends: 3384 [2022-02-15 13:52:20,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:52:20,709 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 150 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:20,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 603 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 409 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-02-15 13:52:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-02-15 13:52:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3017. [2022-02-15 13:52:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.570954907161804) internal successors, (7754), 3016 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 7754 transitions. [2022-02-15 13:52:20,745 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 7754 transitions. Word has length 30 [2022-02-15 13:52:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 7754 transitions. [2022-02-15 13:52:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 7754 transitions. [2022-02-15 13:52:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:20,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:20,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:20,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-15 13:52:20,959 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,SelfDestructingSolverStorable54 [2022-02-15 13:52:20,959 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash -91682509, now seen corresponding path program 51 times [2022-02-15 13:52:20,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:20,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670777074] [2022-02-15 13:52:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:20,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:20,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:20,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670777074] [2022-02-15 13:52:20,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670777074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:20,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001882958] [2022-02-15 13:52:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:20,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:20,991 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) [2022-02-15 13:52:20,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 13:52:21,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:52:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:21,229 INFO L353 Elim1Store]: treesize reduction 50, result has 43.8 percent of original size [2022-02-15 13:52:21,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 91 [2022-02-15 13:52:21,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:21,243 INFO L387 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 93 [2022-02-15 13:52:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:21,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:21,501 INFO L353 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2022-02-15 13:52:21,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 112 [2022-02-15 13:52:21,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:21,519 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-02-15 13:52:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:21,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001882958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:21,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:21,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-02-15 13:52:21,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533541516] [2022-02-15 13:52:21,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:21,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:52:21,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:52:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:52:21,571 INFO L87 Difference]: Start difference. First operand 3017 states and 7754 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-02-15 13:52:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:21,737 INFO L93 Difference]: Finished difference Result 3632 states and 9153 transitions. [2022-02-15 13:52:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:52:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 30 [2022-02-15 13:52:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:21,742 INFO L225 Difference]: With dead ends: 3632 [2022-02-15 13:52:21,742 INFO L226 Difference]: Without dead ends: 3610 [2022-02-15 13:52:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:52:21,742 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:21,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 592 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-02-15 13:52:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3254. [2022-02-15 13:52:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 2.5853058715032278) internal successors, (8410), 3253 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 8410 transitions. [2022-02-15 13:52:21,800 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 8410 transitions. Word has length 30 [2022-02-15 13:52:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:21,800 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 8410 transitions. [2022-02-15 13:52:21,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-02-15 13:52:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 8410 transitions. [2022-02-15 13:52:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:21,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:21,803 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:21,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-15 13:52:22,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-15 13:52:22,013 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308557, now seen corresponding path program 52 times [2022-02-15 13:52:22,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:22,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795323737] [2022-02-15 13:52:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:22,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:22,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:22,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795323737] [2022-02-15 13:52:22,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795323737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:22,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595261396] [2022-02-15 13:52:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:22,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:22,048 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) [2022-02-15 13:52:22,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 13:52:22,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:22,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-15 13:52:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:22,167 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-15 13:52:22,167 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2022-02-15 13:52:23,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:23,259 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-02-15 13:52:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:23,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:23,466 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-02-15 13:52:23,466 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-02-15 13:52:23,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:23,482 INFO L387 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-02-15 13:52:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:52:23,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595261396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:23,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:23,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 17 [2022-02-15 13:52:23,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626617971] [2022-02-15 13:52:23,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:23,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:52:23,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:23,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:52:23,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:52:23,526 INFO L87 Difference]: Start difference. First operand 3254 states and 8410 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-02-15 13:52:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:23,627 INFO L93 Difference]: Finished difference Result 3875 states and 9849 transitions. [2022-02-15 13:52:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:52:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 30 [2022-02-15 13:52:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:23,632 INFO L225 Difference]: With dead ends: 3875 [2022-02-15 13:52:23,633 INFO L226 Difference]: Without dead ends: 3868 [2022-02-15 13:52:23,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:52:23,633 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 117 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:23,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 558 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-02-15 13:52:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-02-15 13:52:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3481. [2022-02-15 13:52:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3480 states have (on average 2.5977011494252875) internal successors, (9040), 3480 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) [2022-02-15 13:52:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 9040 transitions. [2022-02-15 13:52:23,684 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 9040 transitions. Word has length 30 [2022-02-15 13:52:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:23,684 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 9040 transitions. [2022-02-15 13:52:23,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-02-15 13:52:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 9040 transitions. [2022-02-15 13:52:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:23,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:23,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:23,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-15 13:52:23,896 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,SelfDestructingSolverStorable56 [2022-02-15 13:52:23,897 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash -761163595, now seen corresponding path program 53 times [2022-02-15 13:52:23,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:23,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140169459] [2022-02-15 13:52:23,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:23,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:23,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140169459] [2022-02-15 13:52:23,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140169459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198712292] [2022-02-15 13:52:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:23,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:23,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:24,004 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) [2022-02-15 13:52:24,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 13:52:24,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:52:24,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:24,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198712292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:24,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:24,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-02-15 13:52:24,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953632708] [2022-02-15 13:52:24,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:24,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:24,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:24,385 INFO L87 Difference]: Start difference. First operand 3481 states and 9040 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:25,613 INFO L93 Difference]: Finished difference Result 4581 states and 11214 transitions. [2022-02-15 13:52:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:52:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:25,618 INFO L225 Difference]: With dead ends: 4581 [2022-02-15 13:52:25,619 INFO L226 Difference]: Without dead ends: 4581 [2022-02-15 13:52:25,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:52:25,619 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:25,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 204 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-02-15 13:52:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3164. [2022-02-15 13:52:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 2.5861523869743914) internal successors, (8180), 3163 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 8180 transitions. [2022-02-15 13:52:25,662 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 8180 transitions. Word has length 32 [2022-02-15 13:52:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:25,662 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 8180 transitions. [2022-02-15 13:52:25,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 8180 transitions. [2022-02-15 13:52:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:25,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:25,665 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:25,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:25,875 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,SelfDestructingSolverStorable57 [2022-02-15 13:52:25,875 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1479898639, now seen corresponding path program 54 times [2022-02-15 13:52:25,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:25,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685417116] [2022-02-15 13:52:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:25,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:25,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685417116] [2022-02-15 13:52:25,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685417116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632515374] [2022-02-15 13:52:25,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:25,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:25,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:25,970 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) [2022-02-15 13:52:25,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 13:52:25,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:52:25,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:26,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:26,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632515374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:26,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:26,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-02-15 13:52:26,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233614922] [2022-02-15 13:52:26,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:26,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:26,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:26,318 INFO L87 Difference]: Start difference. First operand 3164 states and 8180 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) 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) [2022-02-15 13:52:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:27,653 INFO L93 Difference]: Finished difference Result 5243 states and 12644 transitions. [2022-02-15 13:52:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:52:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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 32 [2022-02-15 13:52:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:27,659 INFO L225 Difference]: With dead ends: 5243 [2022-02-15 13:52:27,659 INFO L226 Difference]: Without dead ends: 5139 [2022-02-15 13:52:27,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2156, Invalid=6586, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:52:27,660 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 627 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:27,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 195 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2022-02-15 13:52:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 3339. [2022-02-15 13:52:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.5820850808867584) internal successors, (8619), 3338 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8619 transitions. [2022-02-15 13:52:27,710 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8619 transitions. Word has length 32 [2022-02-15 13:52:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:27,710 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 8619 transitions. [2022-02-15 13:52:27,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) 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) [2022-02-15 13:52:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8619 transitions. [2022-02-15 13:52:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:27,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:27,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:27,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-15 13:52:27,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-15 13:52:27,914 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1937479539, now seen corresponding path program 55 times [2022-02-15 13:52:27,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:27,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140630528] [2022-02-15 13:52:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:27,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:27,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140630528] [2022-02-15 13:52:27,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140630528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600110350] [2022-02-15 13:52:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:27,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:27,987 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) [2022-02-15 13:52:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 13:52:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:28,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:28,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600110350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:28,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:28,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-02-15 13:52:28,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841249043] [2022-02-15 13:52:28,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:28,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:28,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:28,448 INFO L87 Difference]: Start difference. First operand 3339 states and 8619 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:30,095 INFO L93 Difference]: Finished difference Result 6613 states and 16309 transitions. [2022-02-15 13:52:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 13:52:30,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:30,104 INFO L225 Difference]: With dead ends: 6613 [2022-02-15 13:52:30,104 INFO L226 Difference]: Without dead ends: 6601 [2022-02-15 13:52:30,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5469 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 13:52:30,105 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 616 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:30,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 199 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2022-02-15 13:52:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4305. [2022-02-15 13:52:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5820167286245352) internal successors, (11113), 4304 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11113 transitions. [2022-02-15 13:52:30,169 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11113 transitions. Word has length 32 [2022-02-15 13:52:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11113 transitions. [2022-02-15 13:52:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11113 transitions. [2022-02-15 13:52:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:30,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:30,173 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:30,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-15 13:52:30,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:30,374 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 973589675, now seen corresponding path program 56 times [2022-02-15 13:52:30,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:30,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710243618] [2022-02-15 13:52:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:30,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:30,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:30,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710243618] [2022-02-15 13:52:30,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710243618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:30,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037678761] [2022-02-15 13:52:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:30,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:30,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:30,450 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) [2022-02-15 13:52:30,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 13:52:30,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:30,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:30,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:30,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:30,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:30,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037678761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:30,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:30,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-15 13:52:30,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684933620] [2022-02-15 13:52:30,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:30,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:30,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:30,855 INFO L87 Difference]: Start difference. First operand 4305 states and 11113 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:31,716 INFO L93 Difference]: Finished difference Result 4664 states and 11802 transitions. [2022-02-15 13:52:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:52:31,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:31,722 INFO L225 Difference]: With dead ends: 4664 [2022-02-15 13:52:31,722 INFO L226 Difference]: Without dead ends: 4660 [2022-02-15 13:52:31,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:52:31,723 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 232 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:31,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 93 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2022-02-15 13:52:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 4305. [2022-02-15 13:52:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5810873605947955) internal successors, (11109), 4304 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11109 transitions. [2022-02-15 13:52:31,772 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11109 transitions. Word has length 32 [2022-02-15 13:52:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:31,773 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11109 transitions. [2022-02-15 13:52:31,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11109 transitions. [2022-02-15 13:52:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:31,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:31,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:31,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-15 13:52:31,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:31,988 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash 218195441, now seen corresponding path program 57 times [2022-02-15 13:52:31,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:31,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765722990] [2022-02-15 13:52:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:31,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:32,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:32,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765722990] [2022-02-15 13:52:32,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765722990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:32,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914172024] [2022-02-15 13:52:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:32,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:32,062 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) [2022-02-15 13:52:32,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 13:52:32,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:52:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:32,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:32,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914172024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:32,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:32,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-15 13:52:32,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229074206] [2022-02-15 13:52:32,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:32,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:32,485 INFO L87 Difference]: Start difference. First operand 4305 states and 11109 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:33,405 INFO L93 Difference]: Finished difference Result 5836 states and 14714 transitions. [2022-02-15 13:52:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:52:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:33,414 INFO L225 Difference]: With dead ends: 5836 [2022-02-15 13:52:33,414 INFO L226 Difference]: Without dead ends: 5818 [2022-02-15 13:52:33,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:52:33,414 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 318 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:33,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 147 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2022-02-15 13:52:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4428. [2022-02-15 13:52:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.5897899254574206) internal successors, (11465), 4427 states have internal predecessors, (11465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 11465 transitions. [2022-02-15 13:52:33,472 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 11465 transitions. Word has length 32 [2022-02-15 13:52:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:33,472 INFO L470 AbstractCegarLoop]: Abstraction has 4428 states and 11465 transitions. [2022-02-15 13:52:33,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 11465 transitions. [2022-02-15 13:52:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:33,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:33,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:33,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-15 13:52:33,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:33,677 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1357990529, now seen corresponding path program 58 times [2022-02-15 13:52:33,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:33,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194683997] [2022-02-15 13:52:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:33,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:33,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:33,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194683997] [2022-02-15 13:52:33,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194683997] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:33,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171883111] [2022-02-15 13:52:33,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:33,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:33,758 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) [2022-02-15 13:52:33,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 13:52:33,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:33,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:34,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171883111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:34,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:34,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-02-15 13:52:34,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653855294] [2022-02-15 13:52:34,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:34,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:34,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:34,131 INFO L87 Difference]: Start difference. First operand 4428 states and 11465 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:34,984 INFO L93 Difference]: Finished difference Result 5254 states and 13180 transitions. [2022-02-15 13:52:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:52:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:34,991 INFO L225 Difference]: With dead ends: 5254 [2022-02-15 13:52:34,991 INFO L226 Difference]: Without dead ends: 5238 [2022-02-15 13:52:34,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:52:34,992 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 281 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:34,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 133 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2022-02-15 13:52:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4516. [2022-02-15 13:52:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.5918050941306756) internal successors, (11702), 4515 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 11702 transitions. [2022-02-15 13:52:35,052 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 11702 transitions. Word has length 32 [2022-02-15 13:52:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:35,052 INFO L470 AbstractCegarLoop]: Abstraction has 4516 states and 11702 transitions. [2022-02-15 13:52:35,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 11702 transitions. [2022-02-15 13:52:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:35,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:35,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:35,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:35,273 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,SelfDestructingSolverStorable62 [2022-02-15 13:52:35,273 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1087164675, now seen corresponding path program 59 times [2022-02-15 13:52:35,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:35,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674004340] [2022-02-15 13:52:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:35,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:35,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:35,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674004340] [2022-02-15 13:52:35,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674004340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:35,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273469802] [2022-02-15 13:52:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:35,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:35,381 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) [2022-02-15 13:52:35,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 13:52:35,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-15 13:52:35,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:35,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:35,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273469802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:35,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:35,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-02-15 13:52:35,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656806056] [2022-02-15 13:52:35,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:35,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:35,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:35,738 INFO L87 Difference]: Start difference. First operand 4516 states and 11702 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:36,648 INFO L93 Difference]: Finished difference Result 5594 states and 13918 transitions. [2022-02-15 13:52:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:52:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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 32 [2022-02-15 13:52:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:36,668 INFO L225 Difference]: With dead ends: 5594 [2022-02-15 13:52:36,668 INFO L226 Difference]: Without dead ends: 5566 [2022-02-15 13:52:36,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:52:36,672 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:36,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 186 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-02-15 13:52:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 4347. [2022-02-15 13:52:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 2.588587206626783) internal successors, (11250), 4346 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 11250 transitions. [2022-02-15 13:52:36,720 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 11250 transitions. Word has length 32 [2022-02-15 13:52:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:36,720 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 11250 transitions. [2022-02-15 13:52:36,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 11250 transitions. [2022-02-15 13:52:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:36,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:36,724 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:36,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-15 13:52:36,924 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,SelfDestructingSolverStorable63 [2022-02-15 13:52:36,924 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1534204807, now seen corresponding path program 60 times [2022-02-15 13:52:36,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:36,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787735876] [2022-02-15 13:52:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:36,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:36,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:36,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787735876] [2022-02-15 13:52:36,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787735876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:36,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782616520] [2022-02-15 13:52:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:36,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:37,001 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) [2022-02-15 13:52:37,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 13:52:37,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-15 13:52:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:37,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:37,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782616520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:37,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:37,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-02-15 13:52:37,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825218172] [2022-02-15 13:52:37,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:37,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:37,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:37,366 INFO L87 Difference]: Start difference. First operand 4347 states and 11250 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:38,236 INFO L93 Difference]: Finished difference Result 5720 states and 14080 transitions. [2022-02-15 13:52:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:52:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 32 [2022-02-15 13:52:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:38,242 INFO L225 Difference]: With dead ends: 5720 [2022-02-15 13:52:38,243 INFO L226 Difference]: Without dead ends: 5686 [2022-02-15 13:52:38,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:52:38,243 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:38,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 155 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-02-15 13:52:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3872. [2022-02-15 13:52:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.579178506845776) internal successors, (9984), 3871 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 9984 transitions. [2022-02-15 13:52:38,311 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 9984 transitions. Word has length 32 [2022-02-15 13:52:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:38,311 INFO L470 AbstractCegarLoop]: Abstraction has 3872 states and 9984 transitions. [2022-02-15 13:52:38,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 9984 transitions. [2022-02-15 13:52:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:38,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:38,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:38,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:38,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:38,527 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:38,527 INFO L85 PathProgramCache]: Analyzing trace with hash 314403765, now seen corresponding path program 61 times [2022-02-15 13:52:38,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:38,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644861649] [2022-02-15 13:52:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:38,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:38,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:38,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644861649] [2022-02-15 13:52:38,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644861649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:38,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439495216] [2022-02-15 13:52:38,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:38,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:38,620 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) [2022-02-15 13:52:38,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 13:52:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:38,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:38,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:39,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439495216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:39,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:39,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-02-15 13:52:39,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486688150] [2022-02-15 13:52:39,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:39,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:39,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:39,003 INFO L87 Difference]: Start difference. First operand 3872 states and 9984 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:40,327 INFO L93 Difference]: Finished difference Result 5438 states and 13049 transitions. [2022-02-15 13:52:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:52:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:40,333 INFO L225 Difference]: With dead ends: 5438 [2022-02-15 13:52:40,333 INFO L226 Difference]: Without dead ends: 5438 [2022-02-15 13:52:40,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2297, Invalid=6633, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 13:52:40,336 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 364 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:40,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 314 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:52:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2022-02-15 13:52:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 3402. [2022-02-15 13:52:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.5633637165539547) internal successors, (8718), 3401 states have internal predecessors, (8718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 8718 transitions. [2022-02-15 13:52:40,383 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 8718 transitions. Word has length 32 [2022-02-15 13:52:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:40,383 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 8718 transitions. [2022-02-15 13:52:40,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 8718 transitions. [2022-02-15 13:52:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:40,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:40,386 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:40,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-15 13:52:40,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:40,586 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1022655503, now seen corresponding path program 62 times [2022-02-15 13:52:40,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:40,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370708440] [2022-02-15 13:52:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:40,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:40,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:40,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370708440] [2022-02-15 13:52:40,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370708440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:40,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205424022] [2022-02-15 13:52:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:40,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:40,669 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) [2022-02-15 13:52:40,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 13:52:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:41,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205424022] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:41,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:41,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-02-15 13:52:41,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142169464] [2022-02-15 13:52:41,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:41,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:41,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:41,048 INFO L87 Difference]: Start difference. First operand 3402 states and 8718 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:42,036 INFO L93 Difference]: Finished difference Result 4252 states and 10318 transitions. [2022-02-15 13:52:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:52:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 32 [2022-02-15 13:52:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:42,041 INFO L225 Difference]: With dead ends: 4252 [2022-02-15 13:52:42,041 INFO L226 Difference]: Without dead ends: 4186 [2022-02-15 13:52:42,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:52:42,042 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 402 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:42,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 213 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2022-02-15 13:52:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3264. [2022-02-15 13:52:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5485749310450507) internal successors, (8316), 3263 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8316 transitions. [2022-02-15 13:52:42,084 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8316 transitions. Word has length 32 [2022-02-15 13:52:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:42,084 INFO L470 AbstractCegarLoop]: Abstraction has 3264 states and 8316 transitions. [2022-02-15 13:52:42,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8316 transitions. [2022-02-15 13:52:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:42,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:42,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:42,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:42,287 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,SelfDestructingSolverStorable66 [2022-02-15 13:52:42,287 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash -837548363, now seen corresponding path program 63 times [2022-02-15 13:52:42,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:42,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435207936] [2022-02-15 13:52:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:42,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:42,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:42,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435207936] [2022-02-15 13:52:42,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435207936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:42,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928518558] [2022-02-15 13:52:42,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:42,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:42,374 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) [2022-02-15 13:52:42,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 13:52:42,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:52:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:42,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:42,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928518558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:42,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:42,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-02-15 13:52:42,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670314714] [2022-02-15 13:52:42,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:42,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:42,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:42,748 INFO L87 Difference]: Start difference. First operand 3264 states and 8316 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:44,145 INFO L93 Difference]: Finished difference Result 5122 states and 12148 transitions. [2022-02-15 13:52:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:52:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:44,151 INFO L225 Difference]: With dead ends: 5122 [2022-02-15 13:52:44,151 INFO L226 Difference]: Without dead ends: 5122 [2022-02-15 13:52:44,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2888, Invalid=7618, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 13:52:44,152 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 435 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:44,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 244 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2022-02-15 13:52:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 2860. [2022-02-15 13:52:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.5183630640083945) internal successors, (7200), 2859 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 7200 transitions. [2022-02-15 13:52:44,196 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 7200 transitions. Word has length 32 [2022-02-15 13:52:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:44,196 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 7200 transitions. [2022-02-15 13:52:44,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 7200 transitions. [2022-02-15 13:52:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:44,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:44,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:44,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-15 13:52:44,399 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,SelfDestructingSolverStorable67 [2022-02-15 13:52:44,399 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash -834470415, now seen corresponding path program 64 times [2022-02-15 13:52:44,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:44,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242017031] [2022-02-15 13:52:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:44,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:44,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:44,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242017031] [2022-02-15 13:52:44,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242017031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:44,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070849291] [2022-02-15 13:52:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:44,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:44,488 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) [2022-02-15 13:52:44,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 13:52:44,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:44,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:44,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:44,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070849291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:44,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:44,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-02-15 13:52:44,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637185070] [2022-02-15 13:52:44,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:44,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:44,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:44,859 INFO L87 Difference]: Start difference. First operand 2860 states and 7200 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:45,690 INFO L93 Difference]: Finished difference Result 3661 states and 8825 transitions. [2022-02-15 13:52:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:52:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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 32 [2022-02-15 13:52:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:45,695 INFO L225 Difference]: With dead ends: 3661 [2022-02-15 13:52:45,695 INFO L226 Difference]: Without dead ends: 3622 [2022-02-15 13:52:45,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1362, Invalid=4040, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:52:45,696 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 283 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:45,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 211 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2022-02-15 13:52:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 2809. [2022-02-15 13:52:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.508190883190883) internal successors, (7043), 2808 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7043 transitions. [2022-02-15 13:52:45,734 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7043 transitions. Word has length 32 [2022-02-15 13:52:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:45,735 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 7043 transitions. [2022-02-15 13:52:45,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7043 transitions. [2022-02-15 13:52:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:45,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:45,737 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:45,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-15 13:52:45,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:45,938 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash 341139893, now seen corresponding path program 65 times [2022-02-15 13:52:45,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:45,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071848456] [2022-02-15 13:52:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:45,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:46,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:46,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071848456] [2022-02-15 13:52:46,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071848456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:46,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592531773] [2022-02-15 13:52:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:46,052 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) [2022-02-15 13:52:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 13:52:46,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:52:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:46,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:46,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592531773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:46,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:46,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-02-15 13:52:46,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510046348] [2022-02-15 13:52:46,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:46,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:46,453 INFO L87 Difference]: Start difference. First operand 2809 states and 7043 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:48,072 INFO L93 Difference]: Finished difference Result 5194 states and 12216 transitions. [2022-02-15 13:52:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:52:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:48,078 INFO L225 Difference]: With dead ends: 5194 [2022-02-15 13:52:48,078 INFO L226 Difference]: Without dead ends: 5194 [2022-02-15 13:52:48,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5287 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3777, Invalid=9333, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 13:52:48,080 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 512 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:48,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 277 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:52:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2022-02-15 13:52:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3307. [2022-02-15 13:52:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3306 states have (on average 2.481246218995765) internal successors, (8203), 3306 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 8203 transitions. [2022-02-15 13:52:48,129 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 8203 transitions. Word has length 32 [2022-02-15 13:52:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 3307 states and 8203 transitions. [2022-02-15 13:52:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 8203 transitions. [2022-02-15 13:52:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:48,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:48,132 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:48,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-15 13:52:48,332 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,SelfDestructingSolverStorable69 [2022-02-15 13:52:48,332 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1427175409, now seen corresponding path program 66 times [2022-02-15 13:52:48,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:48,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979015199] [2022-02-15 13:52:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:48,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:48,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:48,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979015199] [2022-02-15 13:52:48,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979015199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:48,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800088436] [2022-02-15 13:52:48,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:48,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:48,406 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) [2022-02-15 13:52:48,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 13:52:48,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:52:48,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:48,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:48,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:48,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800088436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:48,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:48,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-02-15 13:52:48,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102731002] [2022-02-15 13:52:48,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:48,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:48,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:48,780 INFO L87 Difference]: Start difference. First operand 3307 states and 8203 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:49,566 INFO L93 Difference]: Finished difference Result 3840 states and 9263 transitions. [2022-02-15 13:52:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:52:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:49,571 INFO L225 Difference]: With dead ends: 3840 [2022-02-15 13:52:49,571 INFO L226 Difference]: Without dead ends: 3822 [2022-02-15 13:52:49,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:52:49,572 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 216 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-02-15 13:52:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3381. [2022-02-15 13:52:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 2.486094674556213) internal successors, (8403), 3380 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 8403 transitions. [2022-02-15 13:52:49,617 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 8403 transitions. Word has length 32 [2022-02-15 13:52:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:49,617 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 8403 transitions. [2022-02-15 13:52:49,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 8403 transitions. [2022-02-15 13:52:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:49,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:49,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:49,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-15 13:52:49,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:49,820 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash 556891317, now seen corresponding path program 67 times [2022-02-15 13:52:49,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:49,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886357863] [2022-02-15 13:52:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:49,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:49,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:49,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886357863] [2022-02-15 13:52:49,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886357863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:49,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056793047] [2022-02-15 13:52:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:49,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:49,892 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) [2022-02-15 13:52:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 13:52:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:49,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:50,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:50,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056793047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:50,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:50,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-02-15 13:52:50,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855899558] [2022-02-15 13:52:50,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:50,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:50,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:50,311 INFO L87 Difference]: Start difference. First operand 3381 states and 8403 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:52,237 INFO L93 Difference]: Finished difference Result 6567 states and 15776 transitions. [2022-02-15 13:52:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 13:52:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:52,245 INFO L225 Difference]: With dead ends: 6567 [2022-02-15 13:52:52,245 INFO L226 Difference]: Without dead ends: 6567 [2022-02-15 13:52:52,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7212 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4899, Invalid=12131, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 13:52:52,246 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 719 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:52,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 204 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:52:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-02-15 13:52:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 5144. [2022-02-15 13:52:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5143 states have (on average 2.52109663620455) internal successors, (12966), 5143 states have internal predecessors, (12966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 12966 transitions. [2022-02-15 13:52:52,313 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 12966 transitions. Word has length 32 [2022-02-15 13:52:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:52,313 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 12966 transitions. [2022-02-15 13:52:52,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 12966 transitions. [2022-02-15 13:52:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:52,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:52,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:52,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:52,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:52,517 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1389129317, now seen corresponding path program 68 times [2022-02-15 13:52:52,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:52,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262347629] [2022-02-15 13:52:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:52,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:52,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:52,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262347629] [2022-02-15 13:52:52,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262347629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:52,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242367488] [2022-02-15 13:52:52,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:52,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:52,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:52,582 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) [2022-02-15 13:52:52,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 13:52:52,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:52,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:52,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:52,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242367488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:52,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:52,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-02-15 13:52:52,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491084450] [2022-02-15 13:52:52,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:52,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:52,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:52,992 INFO L87 Difference]: Start difference. First operand 5144 states and 12966 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:54,215 INFO L93 Difference]: Finished difference Result 6009 states and 14677 transitions. [2022-02-15 13:52:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:52:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:54,223 INFO L225 Difference]: With dead ends: 6009 [2022-02-15 13:52:54,223 INFO L226 Difference]: Without dead ends: 6005 [2022-02-15 13:52:54,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2532, Invalid=6398, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 13:52:54,224 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 452 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:54,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 117 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-02-15 13:52:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5062. [2022-02-15 13:52:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5061 states have (on average 2.517091483896463) internal successors, (12739), 5061 states have internal predecessors, (12739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 12739 transitions. [2022-02-15 13:52:54,302 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 12739 transitions. Word has length 32 [2022-02-15 13:52:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 5062 states and 12739 transitions. [2022-02-15 13:52:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 12739 transitions. [2022-02-15 13:52:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:54,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:54,306 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:54,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-15 13:52:54,507 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,SelfDestructingSolverStorable72 [2022-02-15 13:52:54,507 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1895475583, now seen corresponding path program 69 times [2022-02-15 13:52:54,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:54,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019683878] [2022-02-15 13:52:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:54,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:54,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:54,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019683878] [2022-02-15 13:52:54,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019683878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:54,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825186867] [2022-02-15 13:52:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:54,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:54,581 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) [2022-02-15 13:52:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 13:52:54,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:52:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:54,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:54,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825186867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:54,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:54,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-02-15 13:52:54,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856253990] [2022-02-15 13:52:54,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:54,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:54,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:54,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:54,967 INFO L87 Difference]: Start difference. First operand 5062 states and 12739 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:56,114 INFO L93 Difference]: Finished difference Result 6244 states and 15277 transitions. [2022-02-15 13:52:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:52:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-15 13:52:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:56,122 INFO L225 Difference]: With dead ends: 6244 [2022-02-15 13:52:56,122 INFO L226 Difference]: Without dead ends: 6232 [2022-02-15 13:52:56,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:52:56,124 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:56,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 123 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2022-02-15 13:52:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5108. [2022-02-15 13:52:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.522811826904249) internal successors, (12884), 5107 states have internal predecessors, (12884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 12884 transitions. [2022-02-15 13:52:56,200 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 12884 transitions. Word has length 32 [2022-02-15 13:52:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:56,200 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 12884 transitions. [2022-02-15 13:52:56,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 12884 transitions. [2022-02-15 13:52:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:56,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:56,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:56,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-15 13:52:56,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:56,404 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2122696963, now seen corresponding path program 70 times [2022-02-15 13:52:56,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:56,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769032312] [2022-02-15 13:52:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:56,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:56,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:56,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769032312] [2022-02-15 13:52:56,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769032312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:56,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021900170] [2022-02-15 13:52:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:56,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:56,483 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) [2022-02-15 13:52:56,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 13:52:56,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:56,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:56,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021900170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:56,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:56,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-02-15 13:52:56,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911450357] [2022-02-15 13:52:56,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:56,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:56,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:56,863 INFO L87 Difference]: Start difference. First operand 5108 states and 12884 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:57,956 INFO L93 Difference]: Finished difference Result 6722 states and 16413 transitions. [2022-02-15 13:52:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:52:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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 32 [2022-02-15 13:52:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:57,966 INFO L225 Difference]: With dead ends: 6722 [2022-02-15 13:52:57,966 INFO L226 Difference]: Without dead ends: 6702 [2022-02-15 13:52:57,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1999, Invalid=5311, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:52:57,968 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 440 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:57,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 141 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:52:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2022-02-15 13:52:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 5738. [2022-02-15 13:52:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 2.5281506013595956) internal successors, (14504), 5737 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 14504 transitions. [2022-02-15 13:52:58,073 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 14504 transitions. Word has length 32 [2022-02-15 13:52:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 5738 states and 14504 transitions. [2022-02-15 13:52:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) 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) [2022-02-15 13:52:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 14504 transitions. [2022-02-15 13:52:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:58,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:58,078 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:58,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:58,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:58,294 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1439111047, now seen corresponding path program 71 times [2022-02-15 13:52:58,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:58,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686283103] [2022-02-15 13:52:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:58,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:52:58,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:58,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686283103] [2022-02-15 13:52:58,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686283103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:58,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541169791] [2022-02-15 13:52:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:58,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:58,377 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) [2022-02-15 13:52:58,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 13:52:58,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:52:58,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:52:58,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:58,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541169791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:58,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:58,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-02-15 13:52:58,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128826133] [2022-02-15 13:52:58,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:58,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:58,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:58,726 INFO L87 Difference]: Start difference. First operand 5738 states and 14504 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:59,764 INFO L93 Difference]: Finished difference Result 7634 states and 18636 transitions. [2022-02-15 13:52:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:52:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 32 [2022-02-15 13:52:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:59,777 INFO L225 Difference]: With dead ends: 7634 [2022-02-15 13:52:59,777 INFO L226 Difference]: Without dead ends: 7606 [2022-02-15 13:52:59,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1968, Invalid=5342, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:52:59,779 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 485 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:59,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 139 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:52:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2022-02-15 13:52:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 6549. [2022-02-15 13:52:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 6548 states have (on average 2.5284056200366525) internal successors, (16556), 6548 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 16556 transitions. [2022-02-15 13:52:59,913 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 16556 transitions. Word has length 32 [2022-02-15 13:52:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:59,913 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 16556 transitions. [2022-02-15 13:52:59,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2022-02-15 13:52:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 16556 transitions. [2022-02-15 13:52:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 13:52:59,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:59,918 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:59,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-15 13:53:00,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:00,119 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1643042059, now seen corresponding path program 72 times [2022-02-15 13:53:00,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:00,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064182277] [2022-02-15 13:53:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:00,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:00,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:00,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064182277] [2022-02-15 13:53:00,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064182277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:00,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814281271] [2022-02-15 13:53:00,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:00,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:00,199 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) [2022-02-15 13:53:00,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 13:53:00,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:53:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:53:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:00,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:00,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814281271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:00,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:00,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-02-15 13:53:00,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021906547] [2022-02-15 13:53:00,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:00,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:53:00,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:53:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:53:00,534 INFO L87 Difference]: Start difference. First operand 6549 states and 16556 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-02-15 13:53:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:01,455 INFO L93 Difference]: Finished difference Result 7611 states and 18726 transitions. [2022-02-15 13:53:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:53:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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 32 [2022-02-15 13:53:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:01,467 INFO L225 Difference]: With dead ends: 7611 [2022-02-15 13:53:01,467 INFO L226 Difference]: Without dead ends: 7575 [2022-02-15 13:53:01,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 13:53:01,468 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 393 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:01,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 129 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:53:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2022-02-15 13:53:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 6635. [2022-02-15 13:53:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.537232438950859) internal successors, (16832), 6634 states have internal predecessors, (16832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 16832 transitions. [2022-02-15 13:53:01,601 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 16832 transitions. Word has length 32 [2022-02-15 13:53:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 6635 states and 16832 transitions. [2022-02-15 13:53:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 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) [2022-02-15 13:53:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 16832 transitions. [2022-02-15 13:53:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:01,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:01,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:01,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-15 13:53:01,819 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,SelfDestructingSolverStorable76 [2022-02-15 13:53:01,820 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2038373619, now seen corresponding path program 73 times [2022-02-15 13:53:01,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:01,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844063226] [2022-02-15 13:53:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:01,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:01,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:01,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844063226] [2022-02-15 13:53:01,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844063226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:01,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090184991] [2022-02-15 13:53:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:01,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:01,856 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) [2022-02-15 13:53:01,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 13:53:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:01,999 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:01,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-02-15 13:53:06,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:06,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-02-15 13:53:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:06,677 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:06,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-02-15 13:53:06,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:06,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-02-15 13:53:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:06,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090184991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:06,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:06,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-02-15 13:53:06,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215338186] [2022-02-15 13:53:06,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:06,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:53:06,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:53:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:06,784 INFO L87 Difference]: Start difference. First operand 6635 states and 16832 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-02-15 13:53:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:06,897 INFO L93 Difference]: Finished difference Result 7849 states and 19710 transitions. [2022-02-15 13:53:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:53:06,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 34 [2022-02-15 13:53:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:06,914 INFO L225 Difference]: With dead ends: 7849 [2022-02-15 13:53:06,914 INFO L226 Difference]: Without dead ends: 7842 [2022-02-15 13:53:06,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:06,914 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:06,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 738 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-02-15 13:53:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-02-15 13:53:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7432. [2022-02-15 13:53:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 2.5446104158255953) internal successors, (18909), 7431 states have internal predecessors, (18909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 18909 transitions. [2022-02-15 13:53:07,031 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 18909 transitions. Word has length 34 [2022-02-15 13:53:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:07,031 INFO L470 AbstractCegarLoop]: Abstraction has 7432 states and 18909 transitions. [2022-02-15 13:53:07,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-02-15 13:53:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 18909 transitions. [2022-02-15 13:53:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:07,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:07,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:07,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-15 13:53:07,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:07,258 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:07,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1746623611, now seen corresponding path program 74 times [2022-02-15 13:53:07,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:07,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238237021] [2022-02-15 13:53:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:07,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:07,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:07,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238237021] [2022-02-15 13:53:07,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238237021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:07,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562304550] [2022-02-15 13:53:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:07,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:07,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:07,304 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) [2022-02-15 13:53:07,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 13:53:07,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:07,455 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:07,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-02-15 13:53:12,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:12,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-02-15 13:53:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:12,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:12,768 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:12,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-02-15 13:53:12,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:12,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-02-15 13:53:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:12,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562304550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:12,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:12,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-02-15 13:53:12,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373356776] [2022-02-15 13:53:12,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:12,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:53:12,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:53:12,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:12,893 INFO L87 Difference]: Start difference. First operand 7432 states and 18909 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-02-15 13:53:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:13,065 INFO L93 Difference]: Finished difference Result 7936 states and 19797 transitions. [2022-02-15 13:53:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:53:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 34 [2022-02-15 13:53:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:13,076 INFO L225 Difference]: With dead ends: 7936 [2022-02-15 13:53:13,076 INFO L226 Difference]: Without dead ends: 7933 [2022-02-15 13:53:13,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:13,076 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 151 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:13,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 951 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-02-15 13:53:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2022-02-15 13:53:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 7478. [2022-02-15 13:53:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7477 states have (on average 2.5451384245018054) internal successors, (19030), 7477 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 19030 transitions. [2022-02-15 13:53:13,186 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 19030 transitions. Word has length 34 [2022-02-15 13:53:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 19030 transitions. [2022-02-15 13:53:13,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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) [2022-02-15 13:53:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 19030 transitions. [2022-02-15 13:53:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:13,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:13,193 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:13,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:13,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:13,408 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 60071939, now seen corresponding path program 75 times [2022-02-15 13:53:13,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:13,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592222522] [2022-02-15 13:53:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:13,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:13,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:13,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592222522] [2022-02-15 13:53:13,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592222522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:13,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854948683] [2022-02-15 13:53:13,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:13,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:13,444 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) [2022-02-15 13:53:13,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 13:53:13,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:53:13,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:13,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-15 13:53:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:13,846 INFO L353 Elim1Store]: treesize reduction 409, result has 22.7 percent of original size [2022-02-15 13:53:13,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 142 treesize of output 175 [2022-02-15 13:53:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:14,210 INFO L353 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2022-02-15 13:53:14,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 134 [2022-02-15 13:53:14,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:14,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-02-15 13:53:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:14,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854948683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:14,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:14,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-02-15 13:53:14,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150324390] [2022-02-15 13:53:14,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:14,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:53:14,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:53:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:53:14,319 INFO L87 Difference]: Start difference. First operand 7478 states and 19030 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:14,542 INFO L93 Difference]: Finished difference Result 7725 states and 19406 transitions. [2022-02-15 13:53:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:53:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 13:53:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:14,553 INFO L225 Difference]: With dead ends: 7725 [2022-02-15 13:53:14,554 INFO L226 Difference]: Without dead ends: 7722 [2022-02-15 13:53:14,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:53:14,554 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 145 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:14,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 693 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:53:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7722 states. [2022-02-15 13:53:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7722 to 7360. [2022-02-15 13:53:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 2.545726321511075) internal successors, (18734), 7359 states have internal predecessors, (18734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 18734 transitions. [2022-02-15 13:53:14,669 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 18734 transitions. Word has length 34 [2022-02-15 13:53:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:14,669 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 18734 transitions. [2022-02-15 13:53:14,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 18734 transitions. [2022-02-15 13:53:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:14,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:14,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:14,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-15 13:53:14,875 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,SelfDestructingSolverStorable79 [2022-02-15 13:53:14,875 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1739321357, now seen corresponding path program 76 times [2022-02-15 13:53:14,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:14,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138938868] [2022-02-15 13:53:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:14,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:14,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:14,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138938868] [2022-02-15 13:53:14,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138938868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:14,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288164182] [2022-02-15 13:53:14,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:14,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:14,914 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) [2022-02-15 13:53:14,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 13:53:14,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:14,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:15,207 INFO L353 Elim1Store]: treesize reduction 267, result has 26.8 percent of original size [2022-02-15 13:53:15,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 142 [2022-02-15 13:53:15,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:15,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 144 [2022-02-15 13:53:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:15,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:15,667 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:15,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 114 [2022-02-15 13:53:15,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:15,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 152 [2022-02-15 13:53:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:15,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288164182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:15,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:15,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 25 [2022-02-15 13:53:15,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86483468] [2022-02-15 13:53:15,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:15,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:53:15,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:53:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:53:15,789 INFO L87 Difference]: Start difference. First operand 7360 states and 18734 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2022-02-15 13:53:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:16,091 INFO L93 Difference]: Finished difference Result 8196 states and 20663 transitions. [2022-02-15 13:53:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:53:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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 34 [2022-02-15 13:53:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:16,103 INFO L225 Difference]: With dead ends: 8196 [2022-02-15 13:53:16,103 INFO L226 Difference]: Without dead ends: 8180 [2022-02-15 13:53:16,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:53:16,103 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 163 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:16,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 983 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2022-02-15 13:53:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 7776. [2022-02-15 13:53:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 2.5569131832797427) internal successors, (19880), 7775 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 19880 transitions. [2022-02-15 13:53:16,211 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 19880 transitions. Word has length 34 [2022-02-15 13:53:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:16,211 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 19880 transitions. [2022-02-15 13:53:16,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2022-02-15 13:53:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 19880 transitions. [2022-02-15 13:53:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:16,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:16,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:16,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-15 13:53:16,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:16,419 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1003418867, now seen corresponding path program 77 times [2022-02-15 13:53:16,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:16,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020898380] [2022-02-15 13:53:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:16,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:16,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:16,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020898380] [2022-02-15 13:53:16,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020898380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:16,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279735301] [2022-02-15 13:53:16,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:16,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:16,479 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) [2022-02-15 13:53:16,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 13:53:16,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-15 13:53:16,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:16,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:53:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:16,729 INFO L353 Elim1Store]: treesize reduction 156, result has 35.3 percent of original size [2022-02-15 13:53:16,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 125 [2022-02-15 13:53:16,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:16,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 144 [2022-02-15 13:53:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:16,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:17,259 INFO L353 Elim1Store]: treesize reduction 68, result has 43.8 percent of original size [2022-02-15 13:53:17,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 134 [2022-02-15 13:53:17,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:17,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 152 [2022-02-15 13:53:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:17,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279735301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:17,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:17,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2022-02-15 13:53:17,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699364293] [2022-02-15 13:53:17,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:17,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:53:17,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:53:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:53:17,396 INFO L87 Difference]: Start difference. First operand 7776 states and 19880 transitions. Second operand has 24 states, 24 states have (on average 2.875) 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) [2022-02-15 13:53:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:17,609 INFO L93 Difference]: Finished difference Result 8640 states and 21906 transitions. [2022-02-15 13:53:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:53:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) 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 34 [2022-02-15 13:53:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:17,626 INFO L225 Difference]: With dead ends: 8640 [2022-02-15 13:53:17,626 INFO L226 Difference]: Without dead ends: 8615 [2022-02-15 13:53:17,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:53:17,626 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 168 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 773 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 556 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-02-15 13:53:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2022-02-15 13:53:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 8091. [2022-02-15 13:53:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 2.5673671199011125) internal successors, (20770), 8090 states have internal predecessors, (20770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 20770 transitions. [2022-02-15 13:53:17,745 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 20770 transitions. Word has length 34 [2022-02-15 13:53:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:17,745 INFO L470 AbstractCegarLoop]: Abstraction has 8091 states and 20770 transitions. [2022-02-15 13:53:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) 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) [2022-02-15 13:53:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 20770 transitions. [2022-02-15 13:53:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:17,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:17,752 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:17,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-15 13:53:17,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:17,955 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:17,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash -333145613, now seen corresponding path program 78 times [2022-02-15 13:53:17,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:17,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878346392] [2022-02-15 13:53:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:17,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:17,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878346392] [2022-02-15 13:53:17,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878346392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145963128] [2022-02-15 13:53:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:17,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:17,987 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) [2022-02-15 13:53:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 13:53:18,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-15 13:53:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-15 13:53:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:18,281 INFO L353 Elim1Store]: treesize reduction 133, result has 35.1 percent of original size [2022-02-15 13:53:18,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 166 treesize of output 132 [2022-02-15 13:53:18,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:18,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 144 [2022-02-15 13:53:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:18,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:18,623 INFO L353 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2022-02-15 13:53:18,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 150 [2022-02-15 13:53:18,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:18,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-02-15 13:53:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:18,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145963128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:18,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:18,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-02-15 13:53:18,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272874254] [2022-02-15 13:53:18,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:18,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:53:18,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:53:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:53:18,782 INFO L87 Difference]: Start difference. First operand 8091 states and 20770 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:19,028 INFO L93 Difference]: Finished difference Result 8983 states and 22909 transitions. [2022-02-15 13:53:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:53:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-15 13:53:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:19,040 INFO L225 Difference]: With dead ends: 8983 [2022-02-15 13:53:19,040 INFO L226 Difference]: Without dead ends: 8961 [2022-02-15 13:53:19,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:53:19,041 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 220 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:19,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 700 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:53:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8961 states. [2022-02-15 13:53:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8961 to 8475. [2022-02-15 13:53:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 2.577059240028322) internal successors, (21838), 8474 states have internal predecessors, (21838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 21838 transitions. [2022-02-15 13:53:19,201 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 21838 transitions. Word has length 34 [2022-02-15 13:53:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 8475 states and 21838 transitions. [2022-02-15 13:53:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 21838 transitions. [2022-02-15 13:53:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:19,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:19,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:19,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-15 13:53:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:19,408 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -576389389, now seen corresponding path program 79 times [2022-02-15 13:53:19,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:19,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897568254] [2022-02-15 13:53:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:19,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:19,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:19,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897568254] [2022-02-15 13:53:19,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897568254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:19,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480878588] [2022-02-15 13:53:19,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:19,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:19,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:19,443 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) [2022-02-15 13:53:19,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 13:53:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:19,601 INFO L353 Elim1Store]: treesize reduction 32, result has 64.0 percent of original size [2022-02-15 13:53:19,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 95 [2022-02-15 13:53:23,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:23,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 144 [2022-02-15 13:53:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:23,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:23,516 INFO L353 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-02-15 13:53:23,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 162 [2022-02-15 13:53:23,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:23,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-02-15 13:53:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:23,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480878588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:23,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:23,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 22 [2022-02-15 13:53:23,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364958552] [2022-02-15 13:53:23,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:23,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:53:23,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:53:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:53:23,654 INFO L87 Difference]: Start difference. First operand 8475 states and 21838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) 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) [2022-02-15 13:53:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:23,851 INFO L93 Difference]: Finished difference Result 9614 states and 24512 transitions. [2022-02-15 13:53:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:53:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) 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 34 [2022-02-15 13:53:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:23,865 INFO L225 Difference]: With dead ends: 9614 [2022-02-15 13:53:23,865 INFO L226 Difference]: Without dead ends: 9581 [2022-02-15 13:53:23,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:53:23,866 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:23,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 821 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 460 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-02-15 13:53:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2022-02-15 13:53:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 8919. [2022-02-15 13:53:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.588024220677282) internal successors, (23080), 8918 states have internal predecessors, (23080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23080 transitions. [2022-02-15 13:53:24,009 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23080 transitions. Word has length 34 [2022-02-15 13:53:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23080 transitions. [2022-02-15 13:53:24,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) 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) [2022-02-15 13:53:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23080 transitions. [2022-02-15 13:53:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 13:53:24,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:24,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:24,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-15 13:53:24,215 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,SelfDestructingSolverStorable83 [2022-02-15 13:53:24,216 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:24,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1889543155, now seen corresponding path program 80 times [2022-02-15 13:53:24,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:24,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988695719] [2022-02-15 13:53:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:24,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:24,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:24,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988695719] [2022-02-15 13:53:24,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988695719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:24,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490880947] [2022-02-15 13:53:24,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:24,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:24,251 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) [2022-02-15 13:53:24,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 13:53:24,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:24,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:24,396 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:24,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-02-15 13:53:29,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:29,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-02-15 13:53:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:29,729 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-02-15 13:53:29,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-02-15 13:53:29,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:29,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-02-15 13:53:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:53:29,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490880947] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:29,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:29,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-02-15 13:53:29,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208546389] [2022-02-15 13:53:29,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:29,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:53:29,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:53:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:29,838 INFO L87 Difference]: Start difference. First operand 8919 states and 23080 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-02-15 13:53:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:29,984 INFO L93 Difference]: Finished difference Result 9812 states and 25154 transitions. [2022-02-15 13:53:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:53:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 34 [2022-02-15 13:53:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:29,999 INFO L225 Difference]: With dead ends: 9812 [2022-02-15 13:53:29,999 INFO L226 Difference]: Without dead ends: 9805 [2022-02-15 13:53:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:53:29,999 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:29,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 946 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-02-15 13:53:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-02-15 13:53:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9257. [2022-02-15 13:53:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 2.5956136560069143) internal successors, (24025), 9256 states have internal predecessors, (24025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 24025 transitions. [2022-02-15 13:53:30,150 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 24025 transitions. Word has length 34 [2022-02-15 13:53:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:30,150 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 24025 transitions. [2022-02-15 13:53:30,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-02-15 13:53:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 24025 transitions. [2022-02-15 13:53:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:30,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:30,158 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:30,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-15 13:53:30,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:30,359 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1336215691, now seen corresponding path program 81 times [2022-02-15 13:53:30,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:30,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094749919] [2022-02-15 13:53:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:30,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:30,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:30,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094749919] [2022-02-15 13:53:30,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094749919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:30,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802564180] [2022-02-15 13:53:30,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:30,482 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) [2022-02-15 13:53:30,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 13:53:30,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:53:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:30,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802564180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:30,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:30,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-02-15 13:53:30,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748428919] [2022-02-15 13:53:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:30,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:53:30,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:30,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:53:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:53:30,910 INFO L87 Difference]: Start difference. First operand 9257 states and 24025 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:32,764 INFO L93 Difference]: Finished difference Result 11082 states and 27704 transitions. [2022-02-15 13:53:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:53:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:32,780 INFO L225 Difference]: With dead ends: 11082 [2022-02-15 13:53:32,780 INFO L226 Difference]: Without dead ends: 11082 [2022-02-15 13:53:32,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 13:53:32,782 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:32,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 235 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:53:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-02-15 13:53:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 8556. [2022-02-15 13:53:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8556 states, 8555 states have (on average 2.586791350087668) internal successors, (22130), 8555 states have internal predecessors, (22130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8556 states to 8556 states and 22130 transitions. [2022-02-15 13:53:32,912 INFO L78 Accepts]: Start accepts. Automaton has 8556 states and 22130 transitions. Word has length 36 [2022-02-15 13:53:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:32,912 INFO L470 AbstractCegarLoop]: Abstraction has 8556 states and 22130 transitions. [2022-02-15 13:53:32,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8556 states and 22130 transitions. [2022-02-15 13:53:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:32,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:32,920 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:32,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-15 13:53:33,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:33,120 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash -550858319, now seen corresponding path program 82 times [2022-02-15 13:53:33,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:33,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784375163] [2022-02-15 13:53:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:33,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:33,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:33,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784375163] [2022-02-15 13:53:33,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784375163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:33,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412550770] [2022-02-15 13:53:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:33,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:33,224 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) [2022-02-15 13:53:33,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 13:53:33,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:33,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:33,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412550770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:33,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:33,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-02-15 13:53:33,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155850694] [2022-02-15 13:53:33,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:33,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:33,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:33,676 INFO L87 Difference]: Start difference. First operand 8556 states and 22130 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:35,657 INFO L93 Difference]: Finished difference Result 12764 states and 31601 transitions. [2022-02-15 13:53:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 13:53:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:35,677 INFO L225 Difference]: With dead ends: 12764 [2022-02-15 13:53:35,678 INFO L226 Difference]: Without dead ends: 12621 [2022-02-15 13:53:35,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4767 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3619, Invalid=11633, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 13:53:35,679 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 766 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:35,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 262 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2022-02-15 13:53:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 8919. [2022-02-15 13:53:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.585557299843014) internal successors, (23058), 8918 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23058 transitions. [2022-02-15 13:53:35,868 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23058 transitions. Word has length 36 [2022-02-15 13:53:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:35,868 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23058 transitions. [2022-02-15 13:53:35,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23058 transitions. [2022-02-15 13:53:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:35,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:35,877 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:35,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:36,077 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,SelfDestructingSolverStorable86 [2022-02-15 13:53:36,078 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1782953617, now seen corresponding path program 83 times [2022-02-15 13:53:36,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:36,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845204354] [2022-02-15 13:53:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:36,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:36,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:36,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845204354] [2022-02-15 13:53:36,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845204354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:36,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753594437] [2022-02-15 13:53:36,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:36,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:36,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:36,171 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) [2022-02-15 13:53:36,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 13:53:36,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:53:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:36,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:36,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:36,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753594437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:36,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:36,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-02-15 13:53:36,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802006014] [2022-02-15 13:53:36,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:36,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:53:36,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:53:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:53:36,714 INFO L87 Difference]: Start difference. First operand 8919 states and 23058 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:39,259 INFO L93 Difference]: Finished difference Result 16714 states and 42009 transitions. [2022-02-15 13:53:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-15 13:53:39,259 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:39,285 INFO L225 Difference]: With dead ends: 16714 [2022-02-15 13:53:39,285 INFO L226 Difference]: Without dead ends: 16698 [2022-02-15 13:53:39,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10728 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6963, Invalid=18477, Unknown=0, NotChecked=0, Total=25440 [2022-02-15 13:53:39,288 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 871 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:39,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 258 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:53:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2022-02-15 13:53:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 11626. [2022-02-15 13:53:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.584602150537634) internal successors, (30046), 11625 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30046 transitions. [2022-02-15 13:53:39,572 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30046 transitions. Word has length 36 [2022-02-15 13:53:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30046 transitions. [2022-02-15 13:53:39,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30046 transitions. [2022-02-15 13:53:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:39,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:39,581 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:39,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-15 13:53:39,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:39,781 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash 399055535, now seen corresponding path program 84 times [2022-02-15 13:53:39,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:39,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693337964] [2022-02-15 13:53:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:39,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:39,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:39,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693337964] [2022-02-15 13:53:39,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693337964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:39,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114496728] [2022-02-15 13:53:39,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:39,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:39,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:39,875 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) [2022-02-15 13:53:39,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 13:53:39,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-02-15 13:53:39,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:40,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:40,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114496728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:40,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:40,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-15 13:53:40,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418994282] [2022-02-15 13:53:40,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:40,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:40,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:40,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:40,373 INFO L87 Difference]: Start difference. First operand 11626 states and 30046 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:41,598 INFO L93 Difference]: Finished difference Result 12191 states and 31159 transitions. [2022-02-15 13:53:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:53:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:41,617 INFO L225 Difference]: With dead ends: 12191 [2022-02-15 13:53:41,618 INFO L226 Difference]: Without dead ends: 12187 [2022-02-15 13:53:41,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 13:53:41,619 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 111 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12187 states. [2022-02-15 13:53:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12187 to 11626. [2022-02-15 13:53:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.5839139784946235) internal successors, (30038), 11625 states have internal predecessors, (30038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30038 transitions. [2022-02-15 13:53:41,786 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30038 transitions. Word has length 36 [2022-02-15 13:53:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30038 transitions. [2022-02-15 13:53:41,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30038 transitions. [2022-02-15 13:53:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:41,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:41,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:41,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:41,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:41,996 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1668365135, now seen corresponding path program 85 times [2022-02-15 13:53:41,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:41,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481658142] [2022-02-15 13:53:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:41,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:42,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:42,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481658142] [2022-02-15 13:53:42,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481658142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:42,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985055610] [2022-02-15 13:53:42,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:42,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:42,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:42,110 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) [2022-02-15 13:53:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:42,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 13:53:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:42,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:42,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985055610] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:42,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:42,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-15 13:53:42,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993049715] [2022-02-15 13:53:42,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:42,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:42,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:42,688 INFO L87 Difference]: Start difference. First operand 11626 states and 30038 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:44,124 INFO L93 Difference]: Finished difference Result 15216 states and 38818 transitions. [2022-02-15 13:53:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 13:53:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:44,147 INFO L225 Difference]: With dead ends: 15216 [2022-02-15 13:53:44,147 INFO L226 Difference]: Without dead ends: 15195 [2022-02-15 13:53:44,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2669, Invalid=7231, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 13:53:44,148 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:44,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 203 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:53:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15195 states. [2022-02-15 13:53:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15195 to 11850. [2022-02-15 13:53:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 2.593467803190143) internal successors, (30730), 11849 states have internal predecessors, (30730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 30730 transitions. [2022-02-15 13:53:44,345 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 30730 transitions. Word has length 36 [2022-02-15 13:53:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:44,345 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 30730 transitions. [2022-02-15 13:53:44,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 30730 transitions. [2022-02-15 13:53:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:44,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:44,353 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:44,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-15 13:53:44,554 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,SelfDestructingSolverStorable89 [2022-02-15 13:53:44,554 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -528570047, now seen corresponding path program 86 times [2022-02-15 13:53:44,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:44,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287846190] [2022-02-15 13:53:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:44,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:44,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:44,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287846190] [2022-02-15 13:53:44,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287846190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:44,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355012751] [2022-02-15 13:53:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:44,673 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) [2022-02-15 13:53:44,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 13:53:44,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:44,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:44,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:45,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355012751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:45,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:45,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-02-15 13:53:45,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672616644] [2022-02-15 13:53:45,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:45,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:45,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:45,135 INFO L87 Difference]: Start difference. First operand 11850 states and 30730 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:46,417 INFO L93 Difference]: Finished difference Result 13259 states and 33760 transitions. [2022-02-15 13:53:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:53:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:46,437 INFO L225 Difference]: With dead ends: 13259 [2022-02-15 13:53:46,437 INFO L226 Difference]: Without dead ends: 13241 [2022-02-15 13:53:46,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2558, Invalid=6948, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 13:53:46,439 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 343 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:46,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 211 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13241 states. [2022-02-15 13:53:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13241 to 12104. [2022-02-15 13:53:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5956374452615054) internal successors, (31415), 12103 states have internal predecessors, (31415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31415 transitions. [2022-02-15 13:53:46,604 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31415 transitions. Word has length 36 [2022-02-15 13:53:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:46,604 INFO L470 AbstractCegarLoop]: Abstraction has 12104 states and 31415 transitions. [2022-02-15 13:53:46,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31415 transitions. [2022-02-15 13:53:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:46,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:46,613 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:46,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-15 13:53:46,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:46,813 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2092355907, now seen corresponding path program 87 times [2022-02-15 13:53:46,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:46,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263748654] [2022-02-15 13:53:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:46,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:46,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:46,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263748654] [2022-02-15 13:53:46,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263748654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:46,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933622744] [2022-02-15 13:53:46,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:46,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:46,894 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) [2022-02-15 13:53:46,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 13:53:46,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-15 13:53:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:47,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:47,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933622744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:47,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:47,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-02-15 13:53:47,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346573688] [2022-02-15 13:53:47,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:47,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:47,407 INFO L87 Difference]: Start difference. First operand 12104 states and 31415 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:48,687 INFO L93 Difference]: Finished difference Result 13923 states and 35275 transitions. [2022-02-15 13:53:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:53:48,688 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:48,709 INFO L225 Difference]: With dead ends: 13923 [2022-02-15 13:53:48,710 INFO L226 Difference]: Without dead ends: 13889 [2022-02-15 13:53:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2571, Invalid=7131, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 13:53:48,711 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 296 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:48,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 237 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-02-15 13:53:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 11939. [2022-02-15 13:53:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11939 states, 11938 states have (on average 2.5983414307254145) internal successors, (31019), 11938 states have internal predecessors, (31019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11939 states to 11939 states and 31019 transitions. [2022-02-15 13:53:48,895 INFO L78 Accepts]: Start accepts. Automaton has 11939 states and 31019 transitions. Word has length 36 [2022-02-15 13:53:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:48,895 INFO L470 AbstractCegarLoop]: Abstraction has 11939 states and 31019 transitions. [2022-02-15 13:53:48,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 11939 states and 31019 transitions. [2022-02-15 13:53:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:48,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:48,905 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:48,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-15 13:53:49,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:49,105 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1652013767, now seen corresponding path program 88 times [2022-02-15 13:53:49,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:49,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755505843] [2022-02-15 13:53:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:49,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:49,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:49,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755505843] [2022-02-15 13:53:49,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755505843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:49,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074259561] [2022-02-15 13:53:49,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:49,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:49,196 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) [2022-02-15 13:53:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 13:53:49,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:49,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:49,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:49,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074259561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:49,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:49,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-02-15 13:53:49,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012134342] [2022-02-15 13:53:49,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:49,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:49,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:49,631 INFO L87 Difference]: Start difference. First operand 11939 states and 31019 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:50,877 INFO L93 Difference]: Finished difference Result 14229 states and 35822 transitions. [2022-02-15 13:53:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:53:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:50,900 INFO L225 Difference]: With dead ends: 14229 [2022-02-15 13:53:50,901 INFO L226 Difference]: Without dead ends: 14185 [2022-02-15 13:53:50,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2592, Invalid=7308, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 13:53:50,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 360 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:50,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 179 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2022-02-15 13:53:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 11149. [2022-02-15 13:53:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 2.601184068891281) internal successors, (28998), 11148 states have internal predecessors, (28998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 28998 transitions. [2022-02-15 13:53:51,111 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 28998 transitions. Word has length 36 [2022-02-15 13:53:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:51,111 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 28998 transitions. [2022-02-15 13:53:51,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 28998 transitions. [2022-02-15 13:53:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:51,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:51,120 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:51,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-15 13:53:51,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:51,321 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash 609987765, now seen corresponding path program 89 times [2022-02-15 13:53:51,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:51,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731453819] [2022-02-15 13:53:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:51,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:51,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:51,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731453819] [2022-02-15 13:53:51,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731453819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:51,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360153070] [2022-02-15 13:53:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:51,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:51,412 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) [2022-02-15 13:53:51,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 13:53:51,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-02-15 13:53:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:51,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:51,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360153070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:51,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:51,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-02-15 13:53:51,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856230056] [2022-02-15 13:53:51,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:51,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:51,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:51,851 INFO L87 Difference]: Start difference. First operand 11149 states and 28998 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:53,150 INFO L93 Difference]: Finished difference Result 13990 states and 34960 transitions. [2022-02-15 13:53:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:53:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:53,172 INFO L225 Difference]: With dead ends: 13990 [2022-02-15 13:53:53,172 INFO L226 Difference]: Without dead ends: 13948 [2022-02-15 13:53:53,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2621, Invalid=7479, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 13:53:53,173 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 403 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:53,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 166 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13948 states. [2022-02-15 13:53:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13948 to 9962. [2022-02-15 13:53:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 2.597731151490814) internal successors, (25876), 9961 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 25876 transitions. [2022-02-15 13:53:53,333 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 25876 transitions. Word has length 36 [2022-02-15 13:53:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:53,333 INFO L470 AbstractCegarLoop]: Abstraction has 9962 states and 25876 transitions. [2022-02-15 13:53:53,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 25876 transitions. [2022-02-15 13:53:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:53,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:53,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:53,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:53,540 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,SelfDestructingSolverStorable93 [2022-02-15 13:53:53,540 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash -759696523, now seen corresponding path program 90 times [2022-02-15 13:53:53,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:53,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811678390] [2022-02-15 13:53:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:53,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:53,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:53,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811678390] [2022-02-15 13:53:53,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811678390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:53,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136221228] [2022-02-15 13:53:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:53,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:53,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:53,664 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) [2022-02-15 13:53:53,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 13:53:53,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:53:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:53,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:54,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136221228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:54,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:54,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-02-15 13:53:54,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679947867] [2022-02-15 13:53:54,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:53:54,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:53:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:53:54,100 INFO L87 Difference]: Start difference. First operand 9962 states and 25876 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:55,984 INFO L93 Difference]: Finished difference Result 12761 states and 31459 transitions. [2022-02-15 13:53:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:53:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:56,005 INFO L225 Difference]: With dead ends: 12761 [2022-02-15 13:53:56,005 INFO L226 Difference]: Without dead ends: 12761 [2022-02-15 13:53:56,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4585 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3550, Invalid=10730, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 13:53:56,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 392 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:56,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 335 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:53:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12761 states. [2022-02-15 13:53:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12761 to 8944. [2022-02-15 13:53:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.5896231689589624) internal successors, (23159), 8943 states have internal predecessors, (23159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 23159 transitions. [2022-02-15 13:53:56,159 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 23159 transitions. Word has length 36 [2022-02-15 13:53:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:56,159 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 23159 transitions. [2022-02-15 13:53:56,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 23159 transitions. [2022-02-15 13:53:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:56,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:56,166 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:56,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:56,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:56,366 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1478431567, now seen corresponding path program 91 times [2022-02-15 13:53:56,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:56,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196864596] [2022-02-15 13:53:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:56,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:56,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:56,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196864596] [2022-02-15 13:53:56,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196864596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:56,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220922347] [2022-02-15 13:53:56,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:56,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:56,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:56,460 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) [2022-02-15 13:53:56,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 13:53:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:56,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:56,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220922347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:56,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:56,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-02-15 13:53:56,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42686602] [2022-02-15 13:53:56,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:56,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:56,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:56,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:56,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:56,895 INFO L87 Difference]: Start difference. First operand 8944 states and 23159 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:58,347 INFO L93 Difference]: Finished difference Result 10626 states and 26434 transitions. [2022-02-15 13:53:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:53:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:53:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:58,360 INFO L225 Difference]: With dead ends: 10626 [2022-02-15 13:53:58,360 INFO L226 Difference]: Without dead ends: 10527 [2022-02-15 13:53:58,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 13:53:58,361 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 503 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:58,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 233 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:53:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2022-02-15 13:53:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 8656. [2022-02-15 13:53:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 2.577007510109763) internal successors, (22304), 8655 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 22304 transitions. [2022-02-15 13:53:58,490 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 22304 transitions. Word has length 36 [2022-02-15 13:53:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 8656 states and 22304 transitions. [2022-02-15 13:53:58,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 22304 transitions. [2022-02-15 13:53:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:53:58,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:58,496 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:58,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-15 13:53:58,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:58,697 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1608257675, now seen corresponding path program 92 times [2022-02-15 13:53:58,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:58,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071488410] [2022-02-15 13:53:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:58,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:53:58,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:58,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071488410] [2022-02-15 13:53:58,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071488410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:58,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676941448] [2022-02-15 13:53:58,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:58,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:58,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:58,793 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) [2022-02-15 13:53:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 13:53:58,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:58,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:53:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:59,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:59,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676941448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:59,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:59,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-02-15 13:53:59,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115012749] [2022-02-15 13:53:59,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:59,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:53:59,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:59,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:53:59,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:53:59,248 INFO L87 Difference]: Start difference. First operand 8656 states and 22304 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:01,219 INFO L93 Difference]: Finished difference Result 12072 states and 29459 transitions. [2022-02-15 13:54:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:54:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:01,236 INFO L225 Difference]: With dead ends: 12072 [2022-02-15 13:54:01,236 INFO L226 Difference]: Without dead ends: 12072 [2022-02-15 13:54:01,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4278, Invalid=11978, Unknown=0, NotChecked=0, Total=16256 [2022-02-15 13:54:01,237 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 495 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:01,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 309 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:54:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2022-02-15 13:54:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 7769. [2022-02-15 13:54:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 2.5607621009268797) internal successors, (19892), 7768 states have internal predecessors, (19892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 19892 transitions. [2022-02-15 13:54:01,368 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 19892 transitions. Word has length 36 [2022-02-15 13:54:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:01,368 INFO L470 AbstractCegarLoop]: Abstraction has 7769 states and 19892 transitions. [2022-02-15 13:54:01,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 19892 transitions. [2022-02-15 13:54:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:01,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:01,374 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:01,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-15 13:54:01,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:01,575 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1349650353, now seen corresponding path program 93 times [2022-02-15 13:54:01,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:01,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116939501] [2022-02-15 13:54:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:01,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:01,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:01,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116939501] [2022-02-15 13:54:01,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116939501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:01,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180028508] [2022-02-15 13:54:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:01,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:01,660 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) [2022-02-15 13:54:01,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 13:54:01,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:54:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:01,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:02,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180028508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:02,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:02,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-02-15 13:54:02,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38353294] [2022-02-15 13:54:02,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:02,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:02,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:02,106 INFO L87 Difference]: Start difference. First operand 7769 states and 19892 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:03,402 INFO L93 Difference]: Finished difference Result 9358 states and 23204 transitions. [2022-02-15 13:54:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:54:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:03,415 INFO L225 Difference]: With dead ends: 9358 [2022-02-15 13:54:03,415 INFO L226 Difference]: Without dead ends: 9292 [2022-02-15 13:54:03,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2308, Invalid=7198, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 13:54:03,417 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 401 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:03,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 290 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:54:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2022-02-15 13:54:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 7746. [2022-02-15 13:54:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 2.5536475145255) internal successors, (19778), 7745 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 19778 transitions. [2022-02-15 13:54:03,558 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 19778 transitions. Word has length 36 [2022-02-15 13:54:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:03,558 INFO L470 AbstractCegarLoop]: Abstraction has 7746 states and 19778 transitions. [2022-02-15 13:54:03,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 19778 transitions. [2022-02-15 13:54:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:03,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:03,564 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:03,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-15 13:54:03,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:03,764 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1872827531, now seen corresponding path program 94 times [2022-02-15 13:54:03,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:03,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949691414] [2022-02-15 13:54:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:03,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:03,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949691414] [2022-02-15 13:54:03,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949691414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282379559] [2022-02-15 13:54:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:03,856 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) [2022-02-15 13:54:03,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 13:54:03,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:03,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:04,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:04,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282379559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:04,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:04,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-02-15 13:54:04,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071109254] [2022-02-15 13:54:04,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:04,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:54:04,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:54:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:54:04,325 INFO L87 Difference]: Start difference. First operand 7746 states and 19778 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:06,602 INFO L93 Difference]: Finished difference Result 11687 states and 28283 transitions. [2022-02-15 13:54:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-15 13:54:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:06,619 INFO L225 Difference]: With dead ends: 11687 [2022-02-15 13:54:06,619 INFO L226 Difference]: Without dead ends: 11687 [2022-02-15 13:54:06,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7992 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5519, Invalid=14221, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 13:54:06,621 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 517 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:06,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 339 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:54:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11687 states. [2022-02-15 13:54:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11687 to 7094. [2022-02-15 13:54:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 7093 states have (on average 2.531791907514451) internal successors, (17958), 7093 states have internal predecessors, (17958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 17958 transitions. [2022-02-15 13:54:06,779 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 17958 transitions. Word has length 36 [2022-02-15 13:54:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:06,779 INFO L470 AbstractCegarLoop]: Abstraction has 7094 states and 17958 transitions. [2022-02-15 13:54:06,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 17958 transitions. [2022-02-15 13:54:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:06,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:06,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:06,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-15 13:54:06,985 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,SelfDestructingSolverStorable98 [2022-02-15 13:54:06,985 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1869749583, now seen corresponding path program 95 times [2022-02-15 13:54:06,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:06,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742836827] [2022-02-15 13:54:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:06,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:07,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:07,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742836827] [2022-02-15 13:54:07,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742836827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:07,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704365660] [2022-02-15 13:54:07,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:54:07,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:07,068 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) [2022-02-15 13:54:07,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 13:54:07,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:54:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:07,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:07,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704365660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:07,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:07,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-02-15 13:54:07,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997027650] [2022-02-15 13:54:07,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:07,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:07,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:07,520 INFO L87 Difference]: Start difference. First operand 7094 states and 17958 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:08,664 INFO L93 Difference]: Finished difference Result 8391 states and 20772 transitions. [2022-02-15 13:54:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:54:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:08,674 INFO L225 Difference]: With dead ends: 8391 [2022-02-15 13:54:08,674 INFO L226 Difference]: Without dead ends: 8352 [2022-02-15 13:54:08,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2137, Invalid=6419, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:54:08,676 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 336 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:08,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 232 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:54:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-02-15 13:54:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7183. [2022-02-15 13:54:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.532442216652743) internal successors, (18188), 7182 states have internal predecessors, (18188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 18188 transitions. [2022-02-15 13:54:08,776 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 18188 transitions. Word has length 36 [2022-02-15 13:54:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:08,777 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 18188 transitions. [2022-02-15 13:54:08,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 18188 transitions. [2022-02-15 13:54:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:08,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:08,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:08,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:08,982 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,SelfDestructingSolverStorable99 [2022-02-15 13:54:08,982 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash 187230069, now seen corresponding path program 96 times [2022-02-15 13:54:08,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:08,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000230621] [2022-02-15 13:54:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:08,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:09,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:09,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000230621] [2022-02-15 13:54:09,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000230621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:09,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818911359] [2022-02-15 13:54:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:54:09,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:09,086 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) [2022-02-15 13:54:09,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 13:54:09,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:54:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:09,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:09,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818911359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:09,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:09,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-02-15 13:54:09,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950386425] [2022-02-15 13:54:09,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:09,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:54:09,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:54:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:54:09,583 INFO L87 Difference]: Start difference. First operand 7183 states and 18188 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:12,139 INFO L93 Difference]: Finished difference Result 12422 states and 29912 transitions. [2022-02-15 13:54:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-15 13:54:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:12,158 INFO L225 Difference]: With dead ends: 12422 [2022-02-15 13:54:12,158 INFO L226 Difference]: Without dead ends: 12422 [2022-02-15 13:54:12,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10582 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6986, Invalid=17194, Unknown=0, NotChecked=0, Total=24180 [2022-02-15 13:54:12,161 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 673 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:12,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 279 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:54:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2022-02-15 13:54:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 8770. [2022-02-15 13:54:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 2.5070133424563803) internal successors, (21984), 8769 states have internal predecessors, (21984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 21984 transitions. [2022-02-15 13:54:12,332 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 21984 transitions. Word has length 36 [2022-02-15 13:54:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:12,332 INFO L470 AbstractCegarLoop]: Abstraction has 8770 states and 21984 transitions. [2022-02-15 13:54:12,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 21984 transitions. [2022-02-15 13:54:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:12,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:12,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:12,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-15 13:54:12,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-15 13:54:12,539 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1273265585, now seen corresponding path program 97 times [2022-02-15 13:54:12,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:12,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241818618] [2022-02-15 13:54:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:12,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:12,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:12,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241818618] [2022-02-15 13:54:12,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241818618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:12,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159518142] [2022-02-15 13:54:12,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:54:12,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:12,621 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) [2022-02-15 13:54:12,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 13:54:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:13,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159518142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:13,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:13,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-02-15 13:54:13,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848244090] [2022-02-15 13:54:13,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:13,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:13,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:13,081 INFO L87 Difference]: Start difference. First operand 8770 states and 21984 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:14,249 INFO L93 Difference]: Finished difference Result 9544 states and 23558 transitions. [2022-02-15 13:54:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:54:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:14,263 INFO L225 Difference]: With dead ends: 9544 [2022-02-15 13:54:14,263 INFO L226 Difference]: Without dead ends: 9526 [2022-02-15 13:54:14,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:54:14,264 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:14,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 260 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:54:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2022-02-15 13:54:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8902. [2022-02-15 13:54:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8902 states, 8901 states have (on average 2.510055049994383) internal successors, (22342), 8901 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 22342 transitions. [2022-02-15 13:54:14,397 INFO L78 Accepts]: Start accepts. Automaton has 8902 states and 22342 transitions. Word has length 36 [2022-02-15 13:54:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:14,397 INFO L470 AbstractCegarLoop]: Abstraction has 8902 states and 22342 transitions. [2022-02-15 13:54:14,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8902 states and 22342 transitions. [2022-02-15 13:54:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:14,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:14,403 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:14,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-02-15 13:54:14,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:14,603 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1749148533, now seen corresponding path program 98 times [2022-02-15 13:54:14,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:14,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993620242] [2022-02-15 13:54:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:14,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:14,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:14,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993620242] [2022-02-15 13:54:14,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993620242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:14,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263636213] [2022-02-15 13:54:14,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:54:14,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:14,715 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) [2022-02-15 13:54:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 13:54:14,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:54:14,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:15,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263636213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:15,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:15,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 35 [2022-02-15 13:54:15,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520069499] [2022-02-15 13:54:15,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:54:15,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:54:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:54:15,277 INFO L87 Difference]: Start difference. First operand 8902 states and 22342 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:18,145 INFO L93 Difference]: Finished difference Result 15970 states and 39092 transitions. [2022-02-15 13:54:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-02-15 13:54:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:18,171 INFO L225 Difference]: With dead ends: 15970 [2022-02-15 13:54:18,172 INFO L226 Difference]: Without dead ends: 15970 [2022-02-15 13:54:18,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13560 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8543, Invalid=21559, Unknown=0, NotChecked=0, Total=30102 [2022-02-15 13:54:18,176 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 735 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:18,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 253 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:54:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15970 states. [2022-02-15 13:54:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15970 to 13330. [2022-02-15 13:54:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13330 states, 13329 states have (on average 2.5292219971490733) internal successors, (33712), 13329 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13330 states to 13330 states and 33712 transitions. [2022-02-15 13:54:18,441 INFO L78 Accepts]: Start accepts. Automaton has 13330 states and 33712 transitions. Word has length 36 [2022-02-15 13:54:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:18,441 INFO L470 AbstractCegarLoop]: Abstraction has 13330 states and 33712 transitions. [2022-02-15 13:54:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13330 states and 33712 transitions. [2022-02-15 13:54:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:18,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:18,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:18,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-15 13:54:18,650 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,SelfDestructingSolverStorable102 [2022-02-15 13:54:18,651 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -196872101, now seen corresponding path program 99 times [2022-02-15 13:54:18,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:18,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842945229] [2022-02-15 13:54:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:18,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:18,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:18,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842945229] [2022-02-15 13:54:18,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842945229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:18,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341447008] [2022-02-15 13:54:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:18,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:18,727 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) [2022-02-15 13:54:18,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 13:54:18,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:54:18,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:18,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:19,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341447008] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:19,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:19,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-02-15 13:54:19,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858893976] [2022-02-15 13:54:19,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:19,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:19,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:19,228 INFO L87 Difference]: Start difference. First operand 13330 states and 33712 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:21,072 INFO L93 Difference]: Finished difference Result 14924 states and 36958 transitions. [2022-02-15 13:54:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 13:54:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:21,092 INFO L225 Difference]: With dead ends: 14924 [2022-02-15 13:54:21,092 INFO L226 Difference]: Without dead ends: 14920 [2022-02-15 13:54:21,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4135, Invalid=10627, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 13:54:21,092 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 547 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:21,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 120 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:54:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2022-02-15 13:54:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 13086. [2022-02-15 13:54:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13085 states have (on average 2.525792892625143) internal successors, (33050), 13085 states have internal predecessors, (33050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 33050 transitions. [2022-02-15 13:54:21,314 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 33050 transitions. Word has length 36 [2022-02-15 13:54:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:21,314 INFO L470 AbstractCegarLoop]: Abstraction has 13086 states and 33050 transitions. [2022-02-15 13:54:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 33050 transitions. [2022-02-15 13:54:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:21,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:21,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:21,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-15 13:54:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-15 13:54:21,540 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -703218367, now seen corresponding path program 100 times [2022-02-15 13:54:21,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:21,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029293296] [2022-02-15 13:54:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:21,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:21,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:21,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029293296] [2022-02-15 13:54:21,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029293296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:21,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706099888] [2022-02-15 13:54:21,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:21,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:21,620 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) [2022-02-15 13:54:21,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 13:54:21,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:21,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:22,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706099888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:22,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:22,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-02-15 13:54:22,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639619560] [2022-02-15 13:54:22,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:22,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:22,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:22,119 INFO L87 Difference]: Start difference. First operand 13086 states and 33050 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:23,788 INFO L93 Difference]: Finished difference Result 15282 states and 37884 transitions. [2022-02-15 13:54:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:54:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:23,812 INFO L225 Difference]: With dead ends: 15282 [2022-02-15 13:54:23,813 INFO L226 Difference]: Without dead ends: 15270 [2022-02-15 13:54:23,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3530, Invalid=9352, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:54:23,814 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:23,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 138 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:54:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2022-02-15 13:54:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 13017. [2022-02-15 13:54:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13017 states, 13016 states have (on average 2.528272894898586) internal successors, (32908), 13016 states have internal predecessors, (32908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13017 states to 13017 states and 32908 transitions. [2022-02-15 13:54:24,058 INFO L78 Accepts]: Start accepts. Automaton has 13017 states and 32908 transitions. Word has length 36 [2022-02-15 13:54:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 13017 states and 32908 transitions. [2022-02-15 13:54:24,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 13017 states and 32908 transitions. [2022-02-15 13:54:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:24,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:24,067 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:24,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-15 13:54:24,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:24,271 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -930439747, now seen corresponding path program 101 times [2022-02-15 13:54:24,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:24,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217260999] [2022-02-15 13:54:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:24,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:24,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:24,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217260999] [2022-02-15 13:54:24,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217260999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:24,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587386679] [2022-02-15 13:54:24,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:54:24,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:24,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:24,361 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) [2022-02-15 13:54:24,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 13:54:24,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:54:24,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:24,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:24,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587386679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:24,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:24,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-02-15 13:54:24,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740722035] [2022-02-15 13:54:24,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:24,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:24,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:24,826 INFO L87 Difference]: Start difference. First operand 13017 states and 32908 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:26,376 INFO L93 Difference]: Finished difference Result 16039 states and 39737 transitions. [2022-02-15 13:54:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:54:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:26,400 INFO L225 Difference]: With dead ends: 16039 [2022-02-15 13:54:26,400 INFO L226 Difference]: Without dead ends: 16019 [2022-02-15 13:54:26,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3172, Invalid=8600, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 13:54:26,402 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:26,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 154 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:54:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2022-02-15 13:54:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 13397. [2022-02-15 13:54:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13397 states, 13396 states have (on average 2.5326216781128696) internal successors, (33927), 13396 states have internal predecessors, (33927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 33927 transitions. [2022-02-15 13:54:26,621 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 33927 transitions. Word has length 36 [2022-02-15 13:54:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:26,621 INFO L470 AbstractCegarLoop]: Abstraction has 13397 states and 33927 transitions. [2022-02-15 13:54:26,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 33927 transitions. [2022-02-15 13:54:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:26,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:26,630 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:26,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-15 13:54:26,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:26,831 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -246853831, now seen corresponding path program 102 times [2022-02-15 13:54:26,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:26,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884084381] [2022-02-15 13:54:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:26,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:26,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:26,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884084381] [2022-02-15 13:54:26,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884084381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:26,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721199747] [2022-02-15 13:54:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:54:26,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:26,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:26,920 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) [2022-02-15 13:54:26,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 13:54:26,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:54:26,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:26,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:26,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:27,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:27,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721199747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:27,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:27,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-02-15 13:54:27,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994710922] [2022-02-15 13:54:27,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:27,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:27,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:27,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:27,371 INFO L87 Difference]: Start difference. First operand 13397 states and 33927 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:28,850 INFO L93 Difference]: Finished difference Result 17468 states and 43250 transitions. [2022-02-15 13:54:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:54:28,850 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:28,879 INFO L225 Difference]: With dead ends: 17468 [2022-02-15 13:54:28,879 INFO L226 Difference]: Without dead ends: 17440 [2022-02-15 13:54:28,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3021, Invalid=8321, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 13:54:28,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 539 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 146 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:54:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17440 states. [2022-02-15 13:54:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17440 to 15583. [2022-02-15 13:54:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 15582 states have (on average 2.5360672570915157) internal successors, (39517), 15582 states have internal predecessors, (39517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 39517 transitions. [2022-02-15 13:54:29,243 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 39517 transitions. Word has length 36 [2022-02-15 13:54:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:29,243 INFO L470 AbstractCegarLoop]: Abstraction has 15583 states and 39517 transitions. [2022-02-15 13:54:29,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 39517 transitions. [2022-02-15 13:54:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:29,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:29,253 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:29,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:29,453 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,SelfDestructingSolverStorable106 [2022-02-15 13:54:29,454 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:29,459 INFO L85 PathProgramCache]: Analyzing trace with hash -450784843, now seen corresponding path program 103 times [2022-02-15 13:54:29,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:29,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904943425] [2022-02-15 13:54:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:29,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:54:29,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:29,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904943425] [2022-02-15 13:54:29,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904943425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:29,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312416530] [2022-02-15 13:54:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:54:29,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:29,556 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) [2022-02-15 13:54:29,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 13:54:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:29,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:29,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312416530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:29,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:29,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-02-15 13:54:29,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090323066] [2022-02-15 13:54:29,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:29,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:29,990 INFO L87 Difference]: Start difference. First operand 15583 states and 39517 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:31,517 INFO L93 Difference]: Finished difference Result 20026 states and 49571 transitions. [2022-02-15 13:54:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 13:54:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:31,552 INFO L225 Difference]: With dead ends: 20026 [2022-02-15 13:54:31,552 INFO L226 Difference]: Without dead ends: 19990 [2022-02-15 13:54:31,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3034, Invalid=8522, Unknown=0, NotChecked=0, Total=11556 [2022-02-15 13:54:31,554 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 600 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:31,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 132 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:54:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2022-02-15 13:54:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 17983. [2022-02-15 13:54:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17983 states, 17982 states have (on average 2.533644755866978) internal successors, (45560), 17982 states have internal predecessors, (45560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 45560 transitions. [2022-02-15 13:54:31,950 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 45560 transitions. Word has length 36 [2022-02-15 13:54:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:31,950 INFO L470 AbstractCegarLoop]: Abstraction has 17983 states and 45560 transitions. [2022-02-15 13:54:31,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 45560 transitions. [2022-02-15 13:54:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 13:54:31,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:31,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:31,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-15 13:54:32,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:32,162 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1140008241, now seen corresponding path program 104 times [2022-02-15 13:54:32,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:32,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139134727] [2022-02-15 13:54:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:32,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:32,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:32,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139134727] [2022-02-15 13:54:32,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139134727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:32,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11082223] [2022-02-15 13:54:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:54:32,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:32,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:32,263 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) [2022-02-15 13:54:32,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 13:54:32,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:54:32,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:54:32,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:32,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:32,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11082223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:32,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:32,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-02-15 13:54:32,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419423510] [2022-02-15 13:54:32,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:32,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:54:32,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:54:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:54:32,676 INFO L87 Difference]: Start difference. First operand 17983 states and 45560 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:33,978 INFO L93 Difference]: Finished difference Result 19957 states and 49654 transitions. [2022-02-15 13:54:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 13:54:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-15 13:54:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:34,011 INFO L225 Difference]: With dead ends: 19957 [2022-02-15 13:54:34,011 INFO L226 Difference]: Without dead ends: 19913 [2022-02-15 13:54:34,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2658, Invalid=7644, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 13:54:34,012 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:34,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 167 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:54:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19913 states. [2022-02-15 13:54:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19913 to 18106. [2022-02-15 13:54:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18106 states, 18105 states have (on average 2.5389671361502346) internal successors, (45968), 18105 states have internal predecessors, (45968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 45968 transitions. [2022-02-15 13:54:34,402 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 45968 transitions. Word has length 36 [2022-02-15 13:54:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:34,402 INFO L470 AbstractCegarLoop]: Abstraction has 18106 states and 45968 transitions. [2022-02-15 13:54:34,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 45968 transitions. [2022-02-15 13:54:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:54:34,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:34,416 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:34,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-15 13:54:34,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:34,617 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash -830876749, now seen corresponding path program 105 times [2022-02-15 13:54:34,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:34,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239544061] [2022-02-15 13:54:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:34,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:34,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:34,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239544061] [2022-02-15 13:54:34,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239544061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:34,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280050019] [2022-02-15 13:54:34,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:34,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:34,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:34,660 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) [2022-02-15 13:54:34,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 13:54:34,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:54:34,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:34,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-15 13:54:34,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:35,130 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-02-15 13:54:35,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 175 treesize of output 155 [2022-02-15 13:54:40,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:40,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-02-15 13:54:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:40,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:41,130 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:54:41,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-02-15 13:54:41,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:41,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-02-15 13:54:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:41,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280050019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:41,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:41,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-02-15 13:54:41,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427766754] [2022-02-15 13:54:41,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:41,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:41,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:41,459 INFO L87 Difference]: Start difference. First operand 18106 states and 45968 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:41,819 INFO L93 Difference]: Finished difference Result 20472 states and 51856 transitions. [2022-02-15 13:54:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:54:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:54:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:41,851 INFO L225 Difference]: With dead ends: 20472 [2022-02-15 13:54:41,851 INFO L226 Difference]: Without dead ends: 20465 [2022-02-15 13:54:41,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:54:41,851 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1012 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 763 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-02-15 13:54:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20465 states. [2022-02-15 13:54:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20465 to 19592. [2022-02-15 13:54:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 2.5449951508345667) internal successors, (49859), 19591 states have internal predecessors, (49859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 49859 transitions. [2022-02-15 13:54:42,187 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 49859 transitions. Word has length 38 [2022-02-15 13:54:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:42,187 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 49859 transitions. [2022-02-15 13:54:42,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 49859 transitions. [2022-02-15 13:54:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:54:42,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:42,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:42,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:42,401 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,SelfDestructingSolverStorable109 [2022-02-15 13:54:42,402 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash 515847431, now seen corresponding path program 106 times [2022-02-15 13:54:42,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:42,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252324839] [2022-02-15 13:54:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:42,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:42,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:42,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252324839] [2022-02-15 13:54:42,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252324839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:42,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440046161] [2022-02-15 13:54:42,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:42,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:42,449 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) [2022-02-15 13:54:42,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 13:54:42,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-15 13:54:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:42,646 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:54:42,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-02-15 13:55:17,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:17,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-02-15 13:55:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:17,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:17,766 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:55:17,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-02-15 13:55:17,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:17,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-02-15 13:55:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:18,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440046161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:18,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:18,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-02-15 13:55:18,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627279715] [2022-02-15 13:55:18,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:18,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:55:18,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:55:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:55:18,081 INFO L87 Difference]: Start difference. First operand 19592 states and 49859 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:18,347 INFO L93 Difference]: Finished difference Result 20311 states and 51220 transitions. [2022-02-15 13:55:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:55:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:18,379 INFO L225 Difference]: With dead ends: 20311 [2022-02-15 13:55:18,379 INFO L226 Difference]: Without dead ends: 20308 [2022-02-15 13:55:18,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:55:18,379 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 197 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:18,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1322 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 601 Invalid, 0 Unknown, 239 Unchecked, 0.2s Time] [2022-02-15 13:55:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20308 states. [2022-02-15 13:55:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20308 to 19572. [2022-02-15 13:55:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19572 states, 19571 states have (on average 2.545552092381585) internal successors, (49819), 19571 states have internal predecessors, (49819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19572 states to 19572 states and 49819 transitions. [2022-02-15 13:55:18,742 INFO L78 Accepts]: Start accepts. Automaton has 19572 states and 49819 transitions. Word has length 38 [2022-02-15 13:55:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:18,742 INFO L470 AbstractCegarLoop]: Abstraction has 19572 states and 49819 transitions. [2022-02-15 13:55:18,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19572 states and 49819 transitions. [2022-02-15 13:55:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:18,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:18,755 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:18,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-15 13:55:18,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:18,956 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1165761971, now seen corresponding path program 107 times [2022-02-15 13:55:18,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:18,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755253750] [2022-02-15 13:55:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:18,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:18,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:18,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755253750] [2022-02-15 13:55:18,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755253750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:18,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422201999] [2022-02-15 13:55:18,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:55:18,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:18,999 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) [2022-02-15 13:55:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 13:55:19,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-15 13:55:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-15 13:55:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:19,449 INFO L353 Elim1Store]: treesize reduction 454, result has 28.1 percent of original size [2022-02-15 13:55:19,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 148 treesize of output 235 [2022-02-15 13:55:19,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:19,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 271 treesize of output 211 [2022-02-15 13:55:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:19,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:19,907 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:55:19,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 152 [2022-02-15 13:55:19,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:19,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 220 [2022-02-15 13:55:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:20,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422201999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:20,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:20,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-02-15 13:55:20,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810647898] [2022-02-15 13:55:20,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:20,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:20,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:20,245 INFO L87 Difference]: Start difference. First operand 19572 states and 49819 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:20,649 INFO L93 Difference]: Finished difference Result 20956 states and 53113 transitions. [2022-02-15 13:55:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:55:20,649 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:20,684 INFO L225 Difference]: With dead ends: 20956 [2022-02-15 13:55:20,685 INFO L226 Difference]: Without dead ends: 20940 [2022-02-15 13:55:20,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:20,685 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 186 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:20,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1180 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:55:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20940 states. [2022-02-15 13:55:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20940 to 20358. [2022-02-15 13:55:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20358 states, 20357 states have (on average 2.5531758117600827) internal successors, (51975), 20357 states have internal predecessors, (51975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20358 states to 20358 states and 51975 transitions. [2022-02-15 13:55:21,105 INFO L78 Accepts]: Start accepts. Automaton has 20358 states and 51975 transitions. Word has length 38 [2022-02-15 13:55:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:21,105 INFO L470 AbstractCegarLoop]: Abstraction has 20358 states and 51975 transitions. [2022-02-15 13:55:21,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 20358 states and 51975 transitions. [2022-02-15 13:55:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:21,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:21,120 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:21,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-15 13:55:21,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-15 13:55:21,320 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:21,322 INFO L85 PathProgramCache]: Analyzing trace with hash 494904243, now seen corresponding path program 108 times [2022-02-15 13:55:21,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:21,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092196761] [2022-02-15 13:55:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:21,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:21,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:21,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092196761] [2022-02-15 13:55:21,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092196761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:21,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226100373] [2022-02-15 13:55:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:55:21,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:21,366 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) [2022-02-15 13:55:21,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 13:55:21,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-02-15 13:55:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-15 13:55:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:21,849 INFO L353 Elim1Store]: treesize reduction 399, result has 26.2 percent of original size [2022-02-15 13:55:21,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 213 treesize of output 210 [2022-02-15 13:55:21,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:21,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 211 [2022-02-15 13:55:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:22,367 INFO L353 Elim1Store]: treesize reduction 148, result has 34.2 percent of original size [2022-02-15 13:55:22,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 204 treesize of output 198 [2022-02-15 13:55:22,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:22,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-15 13:55:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:22,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226100373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:22,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:22,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-15 13:55:22,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348614556] [2022-02-15 13:55:22,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:22,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:55:22,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:55:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:22,605 INFO L87 Difference]: Start difference. First operand 20358 states and 51975 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:23,043 INFO L93 Difference]: Finished difference Result 21454 states and 54680 transitions. [2022-02-15 13:55:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:55:23,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:23,075 INFO L225 Difference]: With dead ends: 21454 [2022-02-15 13:55:23,075 INFO L226 Difference]: Without dead ends: 21436 [2022-02-15 13:55:23,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:23,076 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 176 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:23,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 930 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:55:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21436 states. [2022-02-15 13:55:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21436 to 20898. [2022-02-15 13:55:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20898 states, 20897 states have (on average 2.5599368330382353) internal successors, (53495), 20897 states have internal predecessors, (53495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20898 states to 20898 states and 53495 transitions. [2022-02-15 13:55:23,389 INFO L78 Accepts]: Start accepts. Automaton has 20898 states and 53495 transitions. Word has length 38 [2022-02-15 13:55:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:23,389 INFO L470 AbstractCegarLoop]: Abstraction has 20898 states and 53495 transitions. [2022-02-15 13:55:23,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20898 states and 53495 transitions. [2022-02-15 13:55:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:23,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:23,403 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:23,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-15 13:55:23,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:23,604 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash 45722035, now seen corresponding path program 109 times [2022-02-15 13:55:23,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:23,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314831586] [2022-02-15 13:55:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:23,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:23,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:23,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314831586] [2022-02-15 13:55:23,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314831586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:23,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193661679] [2022-02-15 13:55:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:55:23,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:23,663 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) [2022-02-15 13:55:23,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 13:55:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-15 13:55:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:23,983 INFO L353 Elim1Store]: treesize reduction 188, result has 39.2 percent of original size [2022-02-15 13:55:23,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 169 [2022-02-15 13:55:24,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:24,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 211 [2022-02-15 13:55:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:25,172 INFO L353 Elim1Store]: treesize reduction 144, result has 36.0 percent of original size [2022-02-15 13:55:25,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 196 [2022-02-15 13:55:25,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:25,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-15 13:55:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:25,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193661679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:25,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:25,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 28 [2022-02-15 13:55:25,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000103540] [2022-02-15 13:55:25,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:25,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:55:25,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:55:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:55:25,400 INFO L87 Difference]: Start difference. First operand 20898 states and 53495 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:25,792 INFO L93 Difference]: Finished difference Result 22471 states and 57365 transitions. [2022-02-15 13:55:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:55:25,792 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:25,837 INFO L225 Difference]: With dead ends: 22471 [2022-02-15 13:55:25,837 INFO L226 Difference]: Without dead ends: 22442 [2022-02-15 13:55:25,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:55:25,837 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 208 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1295 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 863 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-02-15 13:55:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2022-02-15 13:55:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 21528. [2022-02-15 13:55:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21528 states, 21527 states have (on average 2.5663585265016025) internal successors, (55246), 21527 states have internal predecessors, (55246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21528 states to 21528 states and 55246 transitions. [2022-02-15 13:55:26,286 INFO L78 Accepts]: Start accepts. Automaton has 21528 states and 55246 transitions. Word has length 38 [2022-02-15 13:55:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:26,286 INFO L470 AbstractCegarLoop]: Abstraction has 21528 states and 55246 transitions. [2022-02-15 13:55:26,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 21528 states and 55246 transitions. [2022-02-15 13:55:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:26,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:26,302 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:26,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-15 13:55:26,502 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,SelfDestructingSolverStorable113 [2022-02-15 13:55:26,502 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2121650253, now seen corresponding path program 110 times [2022-02-15 13:55:26,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:26,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165591454] [2022-02-15 13:55:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:26,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:26,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:26,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165591454] [2022-02-15 13:55:26,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165591454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:26,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106892099] [2022-02-15 13:55:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:55:26,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:26,545 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) [2022-02-15 13:55:26,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 13:55:26,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:55:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-15 13:55:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:26,800 INFO L353 Elim1Store]: treesize reduction 103, result has 49.8 percent of original size [2022-02-15 13:55:26,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 154 treesize of output 148 [2022-02-15 13:55:29,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:29,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 183 treesize of output 211 [2022-02-15 13:55:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:29,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:30,251 INFO L353 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2022-02-15 13:55:30,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 212 [2022-02-15 13:55:30,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:30,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-02-15 13:55:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:30,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106892099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:30,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:30,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 27 [2022-02-15 13:55:30,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266055775] [2022-02-15 13:55:30,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:30,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:55:30,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:55:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:55:30,542 INFO L87 Difference]: Start difference. First operand 21528 states and 55246 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:30,898 INFO L93 Difference]: Finished difference Result 23233 states and 59432 transitions. [2022-02-15 13:55:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:55:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:30,936 INFO L225 Difference]: With dead ends: 23233 [2022-02-15 13:55:30,937 INFO L226 Difference]: Without dead ends: 23200 [2022-02-15 13:55:30,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:55:30,937 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 205 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:30,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1412 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 769 Invalid, 0 Unknown, 239 Unchecked, 0.3s Time] [2022-02-15 13:55:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23200 states. [2022-02-15 13:55:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23200 to 22204. [2022-02-15 13:55:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22204 states, 22203 states have (on average 2.572535242985182) internal successors, (57118), 22203 states have internal predecessors, (57118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22204 states to 22204 states and 57118 transitions. [2022-02-15 13:55:31,417 INFO L78 Accepts]: Start accepts. Automaton has 22204 states and 57118 transitions. Word has length 38 [2022-02-15 13:55:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:31,418 INFO L470 AbstractCegarLoop]: Abstraction has 22204 states and 57118 transitions. [2022-02-15 13:55:31,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22204 states and 57118 transitions. [2022-02-15 13:55:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:31,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:31,433 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:31,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-15 13:55:31,633 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,SelfDestructingSolverStorable114 [2022-02-15 13:55:31,634 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1907280461, now seen corresponding path program 111 times [2022-02-15 13:55:31,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:31,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320264323] [2022-02-15 13:55:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:31,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:31,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:31,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320264323] [2022-02-15 13:55:31,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320264323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:31,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329823693] [2022-02-15 13:55:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:55:31,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:31,680 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) [2022-02-15 13:55:31,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 13:55:31,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-02-15 13:55:31,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:55:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:32,158 INFO L353 Elim1Store]: treesize reduction 98, result has 45.9 percent of original size [2022-02-15 13:55:32,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 201 treesize of output 163 [2022-02-15 13:55:32,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:32,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 211 [2022-02-15 13:55:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:32,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:33,255 INFO L353 Elim1Store]: treesize reduction 272, result has 24.7 percent of original size [2022-02-15 13:55:33,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 156 treesize of output 224 [2022-02-15 13:55:33,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:33,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2022-02-15 13:55:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:55:33,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329823693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:33,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:33,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-02-15 13:55:33,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986903661] [2022-02-15 13:55:33,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:33,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:55:33,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:33,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:55:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:33,541 INFO L87 Difference]: Start difference. First operand 22204 states and 57118 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:34,023 INFO L93 Difference]: Finished difference Result 23839 states and 61167 transitions. [2022-02-15 13:55:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:55:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-15 13:55:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:34,064 INFO L225 Difference]: With dead ends: 23839 [2022-02-15 13:55:34,064 INFO L226 Difference]: Without dead ends: 23809 [2022-02-15 13:55:34,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:34,065 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 215 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:34,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1229 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:55:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2022-02-15 13:55:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 22942. [2022-02-15 13:55:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22942 states, 22941 states have (on average 2.580489080685236) internal successors, (59199), 22941 states have internal predecessors, (59199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22942 states to 22942 states and 59199 transitions. [2022-02-15 13:55:34,527 INFO L78 Accepts]: Start accepts. Automaton has 22942 states and 59199 transitions. Word has length 38 [2022-02-15 13:55:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:34,527 INFO L470 AbstractCegarLoop]: Abstraction has 22942 states and 59199 transitions. [2022-02-15 13:55:34,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22942 states and 59199 transitions. [2022-02-15 13:55:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 13:55:34,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:34,543 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:34,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:34,743 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,SelfDestructingSolverStorable115 [2022-02-15 13:55:34,743 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2056340557, now seen corresponding path program 112 times [2022-02-15 13:55:34,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:34,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548106820] [2022-02-15 13:55:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:34,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:55:34,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:34,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548106820] [2022-02-15 13:55:34,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548106820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:34,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894733471] [2022-02-15 13:55:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:55:34,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:34,796 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) [2022-02-15 13:55:34,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 13:55:34,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:55:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-15 13:55:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:35,007 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:55:35,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-02-15 13:56:23,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:56:23,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-02-15 13:56:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:56:24,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:24,244 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-02-15 13:56:24,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-02-15 13:56:24,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:56:24,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-02-15 13:56:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:56:24,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894733471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:24,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:24,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-02-15 13:56:24,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058086882] [2022-02-15 13:56:24,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:24,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:56:24,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:56:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:56:24,631 INFO L87 Difference]: Start difference. First operand 22942 states and 59199 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2022-02-15 13:56:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:24,903 INFO L93 Difference]: Finished difference Result 24194 states and 62052 transitions. [2022-02-15 13:56:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:56:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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 38 [2022-02-15 13:56:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:25,021 INFO L225 Difference]: With dead ends: 24194 [2022-02-15 13:56:25,021 INFO L226 Difference]: Without dead ends: 24187 [2022-02-15 13:56:25,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:56:25,022 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 221 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:25,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1264 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 473 Invalid, 0 Unknown, 434 Unchecked, 0.2s Time] [2022-02-15 13:56:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24187 states. [2022-02-15 13:56:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24187 to 23411. [2022-02-15 13:56:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23411 states, 23410 states have (on average 2.5850918410935497) internal successors, (60517), 23410 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23411 states to 23411 states and 60517 transitions. [2022-02-15 13:56:25,399 INFO L78 Accepts]: Start accepts. Automaton has 23411 states and 60517 transitions. Word has length 38 [2022-02-15 13:56:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:25,399 INFO L470 AbstractCegarLoop]: Abstraction has 23411 states and 60517 transitions. [2022-02-15 13:56:25,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2022-02-15 13:56:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 23411 states and 60517 transitions. [2022-02-15 13:56:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:25,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:25,421 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:25,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:25,621 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,SelfDestructingSolverStorable116 [2022-02-15 13:56:25,621 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 654351669, now seen corresponding path program 113 times [2022-02-15 13:56:25,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:25,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633083607] [2022-02-15 13:56:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:25,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:25,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:25,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633083607] [2022-02-15 13:56:25,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633083607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:25,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244800140] [2022-02-15 13:56:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:56:25,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:25,769 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) [2022-02-15 13:56:25,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 13:56:25,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-15 13:56:25,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:26,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244800140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:26,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:26,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-02-15 13:56:26,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209427166] [2022-02-15 13:56:26,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:26,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:56:26,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:56:26,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:56:26,309 INFO L87 Difference]: Start difference. First operand 23411 states and 60517 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:29,122 INFO L93 Difference]: Finished difference Result 26391 states and 66661 transitions. [2022-02-15 13:56:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 13:56:29,123 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:29,170 INFO L225 Difference]: With dead ends: 26391 [2022-02-15 13:56:29,170 INFO L226 Difference]: Without dead ends: 26391 [2022-02-15 13:56:29,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6946 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-02-15 13:56:29,173 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 353 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:29,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 341 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:56:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2022-02-15 13:56:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21896. [2022-02-15 13:56:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21896 states, 21895 states have (on average 2.5780771865722767) internal successors, (56447), 21895 states have internal predecessors, (56447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21896 states to 21896 states and 56447 transitions. [2022-02-15 13:56:29,613 INFO L78 Accepts]: Start accepts. Automaton has 21896 states and 56447 transitions. Word has length 40 [2022-02-15 13:56:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:29,614 INFO L470 AbstractCegarLoop]: Abstraction has 21896 states and 56447 transitions. [2022-02-15 13:56:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21896 states and 56447 transitions. [2022-02-15 13:56:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:29,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:29,632 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:29,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:29,833 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash -531457935, now seen corresponding path program 114 times [2022-02-15 13:56:29,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:29,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270920763] [2022-02-15 13:56:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:29,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:29,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:29,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270920763] [2022-02-15 13:56:29,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270920763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:29,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749146540] [2022-02-15 13:56:29,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:56:29,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:29,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:29,957 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) [2022-02-15 13:56:29,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 13:56:29,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-15 13:56:29,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:30,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:30,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749146540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:30,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:30,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-02-15 13:56:30,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327078227] [2022-02-15 13:56:30,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:30,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:30,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:30,476 INFO L87 Difference]: Start difference. First operand 21896 states and 56447 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:33,425 INFO L93 Difference]: Finished difference Result 30410 states and 76384 transitions. [2022-02-15 13:56:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-15 13:56:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:33,573 INFO L225 Difference]: With dead ends: 30410 [2022-02-15 13:56:33,573 INFO L226 Difference]: Without dead ends: 30222 [2022-02-15 13:56:33,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8143 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5686, Invalid=19120, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 13:56:33,574 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1015 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:33,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 277 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:56:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30222 states. [2022-02-15 13:56:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30222 to 22632. [2022-02-15 13:56:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 22631 states have (on average 2.5780124607838806) internal successors, (58343), 22631 states have internal predecessors, (58343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 58343 transitions. [2022-02-15 13:56:34,054 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 58343 transitions. Word has length 40 [2022-02-15 13:56:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 22632 states and 58343 transitions. [2022-02-15 13:56:34,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 58343 transitions. [2022-02-15 13:56:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:34,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:34,072 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:34,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-15 13:56:34,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:34,272 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash -23690603, now seen corresponding path program 115 times [2022-02-15 13:56:34,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:34,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97473637] [2022-02-15 13:56:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:34,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:34,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:34,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97473637] [2022-02-15 13:56:34,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97473637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:34,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621630284] [2022-02-15 13:56:34,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:56:34,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:34,364 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) [2022-02-15 13:56:34,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 13:56:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:35,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621630284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:35,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:35,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 40 [2022-02-15 13:56:35,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072613822] [2022-02-15 13:56:35,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:35,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:56:35,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:35,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:56:35,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:56:35,018 INFO L87 Difference]: Start difference. First operand 22632 states and 58343 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:38,754 INFO L93 Difference]: Finished difference Result 40562 states and 102826 transitions. [2022-02-15 13:56:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 13:56:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:38,828 INFO L225 Difference]: With dead ends: 40562 [2022-02-15 13:56:38,828 INFO L226 Difference]: Without dead ends: 40542 [2022-02-15 13:56:38,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19087 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11545, Invalid=31097, Unknown=0, NotChecked=0, Total=42642 [2022-02-15 13:56:38,831 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 859 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:38,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 289 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:56:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40542 states. [2022-02-15 13:56:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40542 to 29497. [2022-02-15 13:56:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.577230810957418) internal successors, (76018), 29496 states have internal predecessors, (76018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76018 transitions. [2022-02-15 13:56:39,675 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76018 transitions. Word has length 40 [2022-02-15 13:56:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:39,675 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76018 transitions. [2022-02-15 13:56:39,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76018 transitions. [2022-02-15 13:56:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:39,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:39,693 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:39,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-15 13:56:39,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:39,895 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1407588685, now seen corresponding path program 116 times [2022-02-15 13:56:39,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:39,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482380337] [2022-02-15 13:56:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:39,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:39,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:39,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482380337] [2022-02-15 13:56:39,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482380337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:39,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110327765] [2022-02-15 13:56:39,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:56:39,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:39,986 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) [2022-02-15 13:56:39,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 13:56:40,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:56:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:40,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:40,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110327765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:40,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:40,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-15 13:56:40,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141472101] [2022-02-15 13:56:40,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:40,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:40,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:40,562 INFO L87 Difference]: Start difference. First operand 29497 states and 76018 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:42,317 INFO L93 Difference]: Finished difference Result 30394 states and 77833 transitions. [2022-02-15 13:56:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:56:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:42,372 INFO L225 Difference]: With dead ends: 30394 [2022-02-15 13:56:42,372 INFO L226 Difference]: Without dead ends: 30390 [2022-02-15 13:56:42,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 13:56:42,374 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 278 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:42,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 140 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:56:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30390 states. [2022-02-15 13:56:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30390 to 29497. [2022-02-15 13:56:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.5766883645240033) internal successors, (76002), 29496 states have internal predecessors, (76002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76002 transitions. [2022-02-15 13:56:43,088 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76002 transitions. Word has length 40 [2022-02-15 13:56:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76002 transitions. [2022-02-15 13:56:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76002 transitions. [2022-02-15 13:56:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:43,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:43,107 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:43,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:43,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:43,308 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1612029327, now seen corresponding path program 117 times [2022-02-15 13:56:43,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:43,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89182907] [2022-02-15 13:56:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:43,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 53 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:56:43,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:43,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89182907] [2022-02-15 13:56:43,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89182907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:43,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625840834] [2022-02-15 13:56:43,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:56:43,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:43,447 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) [2022-02-15 13:56:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 13:56:43,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:56:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:43,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:44,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625840834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:44,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:44,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-15 13:56:44,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423041560] [2022-02-15 13:56:44,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:44,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:44,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:44,070 INFO L87 Difference]: Start difference. First operand 29497 states and 76002 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:46,108 INFO L93 Difference]: Finished difference Result 37584 states and 96225 transitions. [2022-02-15 13:56:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:56:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:46,176 INFO L225 Difference]: With dead ends: 37584 [2022-02-15 13:56:46,176 INFO L226 Difference]: Without dead ends: 37560 [2022-02-15 13:56:46,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5072 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4219, Invalid=11531, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 13:56:46,177 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 528 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:46,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 217 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:56:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37560 states. [2022-02-15 13:56:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37560 to 29719. [2022-02-15 13:56:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29719 states, 29718 states have (on average 2.5852345379904436) internal successors, (76828), 29718 states have internal predecessors, (76828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29719 states to 29719 states and 76828 transitions. [2022-02-15 13:56:46,805 INFO L78 Accepts]: Start accepts. Automaton has 29719 states and 76828 transitions. Word has length 40 [2022-02-15 13:56:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:46,805 INFO L470 AbstractCegarLoop]: Abstraction has 29719 states and 76828 transitions. [2022-02-15 13:56:46,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29719 states and 76828 transitions. [2022-02-15 13:56:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:46,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:46,825 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:46,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-15 13:56:47,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:47,026 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash -472234239, now seen corresponding path program 118 times [2022-02-15 13:56:47,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:47,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755299942] [2022-02-15 13:56:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:47,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:47,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:47,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755299942] [2022-02-15 13:56:47,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755299942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:47,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960767862] [2022-02-15 13:56:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:56:47,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:47,128 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) [2022-02-15 13:56:47,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 13:56:47,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:56:47,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:47,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:47,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960767862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:47,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:47,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-02-15 13:56:47,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738019566] [2022-02-15 13:56:47,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:47,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:47,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:47,770 INFO L87 Difference]: Start difference. First operand 29719 states and 76828 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:49,564 INFO L93 Difference]: Finished difference Result 32131 states and 82168 transitions. [2022-02-15 13:56:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 13:56:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:49,621 INFO L225 Difference]: With dead ends: 32131 [2022-02-15 13:56:49,621 INFO L226 Difference]: Without dead ends: 32111 [2022-02-15 13:56:49,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3804, Invalid=10476, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 13:56:49,623 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 277 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:56:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32111 states. [2022-02-15 13:56:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32111 to 30307. [2022-02-15 13:56:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30307 states, 30306 states have (on average 2.587045469543985) internal successors, (78403), 30306 states have internal predecessors, (78403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30307 states to 30307 states and 78403 transitions. [2022-02-15 13:56:50,209 INFO L78 Accepts]: Start accepts. Automaton has 30307 states and 78403 transitions. Word has length 40 [2022-02-15 13:56:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:50,209 INFO L470 AbstractCegarLoop]: Abstraction has 30307 states and 78403 transitions. [2022-02-15 13:56:50,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 30307 states and 78403 transitions. [2022-02-15 13:56:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:50,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:50,229 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:50,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-15 13:56:50,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 13:56:50,429 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1148637827, now seen corresponding path program 119 times [2022-02-15 13:56:50,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:50,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463229812] [2022-02-15 13:56:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:50,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:50,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:50,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463229812] [2022-02-15 13:56:50,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463229812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:50,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071065750] [2022-02-15 13:56:50,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:56:50,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:50,539 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) [2022-02-15 13:56:50,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 13:56:50,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-15 13:56:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:50,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:51,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071065750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:51,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:51,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-02-15 13:56:51,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564242913] [2022-02-15 13:56:51,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:51,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:51,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:51,163 INFO L87 Difference]: Start difference. First operand 30307 states and 78403 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:52,916 INFO L93 Difference]: Finished difference Result 33401 states and 85130 transitions. [2022-02-15 13:56:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 13:56:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:52,979 INFO L225 Difference]: With dead ends: 33401 [2022-02-15 13:56:52,979 INFO L226 Difference]: Without dead ends: 33361 [2022-02-15 13:56:52,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3817, Invalid=10703, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 13:56:52,981 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 407 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:52,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 241 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:56:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33361 states. [2022-02-15 13:56:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33361 to 30181. [2022-02-15 13:56:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30181 states, 30180 states have (on average 2.591186216037111) internal successors, (78202), 30180 states have internal predecessors, (78202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30181 states to 30181 states and 78202 transitions. [2022-02-15 13:56:53,628 INFO L78 Accepts]: Start accepts. Automaton has 30181 states and 78202 transitions. Word has length 40 [2022-02-15 13:56:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:53,628 INFO L470 AbstractCegarLoop]: Abstraction has 30181 states and 78202 transitions. [2022-02-15 13:56:53,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 30181 states and 78202 transitions. [2022-02-15 13:56:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:53,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:53,649 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:53,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-15 13:56:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-15 13:56:53,851 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1662543097, now seen corresponding path program 120 times [2022-02-15 13:56:53,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:53,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300485903] [2022-02-15 13:56:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:53,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:53,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300485903] [2022-02-15 13:56:53,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300485903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:53,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395669659] [2022-02-15 13:56:53,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:56:53,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:53,976 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:53,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 13:56:54,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-02-15 13:56:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:54,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:54,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395669659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:54,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:54,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-02-15 13:56:54,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246735217] [2022-02-15 13:56:54,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:54,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:54,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:54,542 INFO L87 Difference]: Start difference. First operand 30181 states and 78202 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:56,447 INFO L93 Difference]: Finished difference Result 33916 states and 86143 transitions. [2022-02-15 13:56:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 13:56:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:56,563 INFO L225 Difference]: With dead ends: 33916 [2022-02-15 13:56:56,563 INFO L226 Difference]: Without dead ends: 33862 [2022-02-15 13:56:56,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3838, Invalid=10924, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 13:56:56,565 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 494 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:56,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 259 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:56:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2022-02-15 13:56:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 28876. [2022-02-15 13:56:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28876 states, 28875 states have (on average 2.596987012987013) internal successors, (74988), 28875 states have internal predecessors, (74988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28876 states to 28876 states and 74988 transitions. [2022-02-15 13:56:57,053 INFO L78 Accepts]: Start accepts. Automaton has 28876 states and 74988 transitions. Word has length 40 [2022-02-15 13:56:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:57,053 INFO L470 AbstractCegarLoop]: Abstraction has 28876 states and 74988 transitions. [2022-02-15 13:56:57,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28876 states and 74988 transitions. [2022-02-15 13:56:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:56:57,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:57,074 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:57,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:57,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-15 13:56:57,275 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1672981877, now seen corresponding path program 121 times [2022-02-15 13:56:57,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:57,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613540859] [2022-02-15 13:56:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:57,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:57,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:57,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613540859] [2022-02-15 13:56:57,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613540859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:57,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415212704] [2022-02-15 13:56:57,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:56:57,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:57,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:57,400 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:57,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 13:56:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:56:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:57,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:57,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415212704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:57,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:57,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-02-15 13:56:57,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019671215] [2022-02-15 13:56:57,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:57,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:56:57,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:57,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:56:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:56:57,965 INFO L87 Difference]: Start difference. First operand 28876 states and 74988 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:59,902 INFO L93 Difference]: Finished difference Result 33473 states and 84685 transitions. [2022-02-15 13:56:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:56:59,902 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:56:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:59,975 INFO L225 Difference]: With dead ends: 33473 [2022-02-15 13:56:59,975 INFO L226 Difference]: Without dead ends: 33417 [2022-02-15 13:56:59,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3867, Invalid=11139, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 13:56:59,976 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 456 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:59,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 204 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:57:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2022-02-15 13:57:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 26468. [2022-02-15 13:57:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26468 states, 26467 states have (on average 2.601541542297956) internal successors, (68855), 26467 states have internal predecessors, (68855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26468 states to 26468 states and 68855 transitions. [2022-02-15 13:57:00,584 INFO L78 Accepts]: Start accepts. Automaton has 26468 states and 68855 transitions. Word has length 40 [2022-02-15 13:57:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:00,584 INFO L470 AbstractCegarLoop]: Abstraction has 26468 states and 68855 transitions. [2022-02-15 13:57:00,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26468 states and 68855 transitions. [2022-02-15 13:57:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:00,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:00,603 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:00,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-15 13:57:00,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-15 13:57:00,804 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1180252431, now seen corresponding path program 122 times [2022-02-15 13:57:00,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:00,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978724276] [2022-02-15 13:57:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:00,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:00,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:00,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978724276] [2022-02-15 13:57:00,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978724276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:00,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251963461] [2022-02-15 13:57:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:57:00,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:00,915 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:00,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 13:57:00,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:57:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:01,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:01,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251963461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:01,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:01,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-02-15 13:57:01,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502450602] [2022-02-15 13:57:01,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:01,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:01,419 INFO L87 Difference]: Start difference. First operand 26468 states and 68855 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:03,359 INFO L93 Difference]: Finished difference Result 32096 states and 80790 transitions. [2022-02-15 13:57:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:57:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:03,421 INFO L225 Difference]: With dead ends: 32096 [2022-02-15 13:57:03,421 INFO L226 Difference]: Without dead ends: 32046 [2022-02-15 13:57:03,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3904, Invalid=11348, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 13:57:03,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 591 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:03,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 228 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:57:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32046 states. [2022-02-15 13:57:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32046 to 24004. [2022-02-15 13:57:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24004 states, 24003 states have (on average 2.599633379160938) internal successors, (62399), 24003 states have internal predecessors, (62399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24004 states to 24004 states and 62399 transitions. [2022-02-15 13:57:03,961 INFO L78 Accepts]: Start accepts. Automaton has 24004 states and 62399 transitions. Word has length 40 [2022-02-15 13:57:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:03,961 INFO L470 AbstractCegarLoop]: Abstraction has 24004 states and 62399 transitions. [2022-02-15 13:57:03,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24004 states and 62399 transitions. [2022-02-15 13:57:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:03,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:03,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:03,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-02-15 13:57:04,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:04,194 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash 620886581, now seen corresponding path program 123 times [2022-02-15 13:57:04,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:04,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501469297] [2022-02-15 13:57:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:04,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:04,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:04,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501469297] [2022-02-15 13:57:04,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501469297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:04,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046854301] [2022-02-15 13:57:04,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:57:04,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:04,471 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:04,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 13:57:04,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:57:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:04,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:05,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046854301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:05,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:05,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-02-15 13:57:05,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197232242] [2022-02-15 13:57:05,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:05,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:05,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:05,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:05,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:05,013 INFO L87 Difference]: Start difference. First operand 24004 states and 62399 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:07,635 INFO L93 Difference]: Finished difference Result 28861 states and 72270 transitions. [2022-02-15 13:57:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 13:57:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:07,688 INFO L225 Difference]: With dead ends: 28861 [2022-02-15 13:57:07,688 INFO L226 Difference]: Without dead ends: 28861 [2022-02-15 13:57:07,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7191 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5273, Invalid=16483, Unknown=0, NotChecked=0, Total=21756 [2022-02-15 13:57:07,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:07,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 364 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:57:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28861 states. [2022-02-15 13:57:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28861 to 21876. [2022-02-15 13:57:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21876 states, 21875 states have (on average 2.5954285714285716) internal successors, (56775), 21875 states have internal predecessors, (56775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21876 states to 21876 states and 56775 transitions. [2022-02-15 13:57:08,108 INFO L78 Accepts]: Start accepts. Automaton has 21876 states and 56775 transitions. Word has length 40 [2022-02-15 13:57:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:08,108 INFO L470 AbstractCegarLoop]: Abstraction has 21876 states and 56775 transitions. [2022-02-15 13:57:08,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 21876 states and 56775 transitions. [2022-02-15 13:57:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:08,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:08,121 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:08,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-15 13:57:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:08,323 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1406243953, now seen corresponding path program 124 times [2022-02-15 13:57:08,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:08,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758682106] [2022-02-15 13:57:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:08,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:08,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:08,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758682106] [2022-02-15 13:57:08,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758682106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:08,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016274959] [2022-02-15 13:57:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:57:08,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:08,435 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:08,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 13:57:08,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:57:08,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:08,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:08,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:08,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016274959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:08,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:08,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-02-15 13:57:08,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928378503] [2022-02-15 13:57:08,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:08,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:08,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:08,952 INFO L87 Difference]: Start difference. First operand 21876 states and 56775 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:11,078 INFO L93 Difference]: Finished difference Result 25120 states and 63294 transitions. [2022-02-15 13:57:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-15 13:57:11,079 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:11,126 INFO L225 Difference]: With dead ends: 25120 [2022-02-15 13:57:11,126 INFO L226 Difference]: Without dead ends: 24982 [2022-02-15 13:57:11,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4209, Invalid=13881, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 13:57:11,128 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 481 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:11,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 308 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:57:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2022-02-15 13:57:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 21296. [2022-02-15 13:57:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21296 states, 21295 states have (on average 2.5844094857947875) internal successors, (55035), 21295 states have internal predecessors, (55035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21296 states to 21296 states and 55035 transitions. [2022-02-15 13:57:11,574 INFO L78 Accepts]: Start accepts. Automaton has 21296 states and 55035 transitions. Word has length 40 [2022-02-15 13:57:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:11,574 INFO L470 AbstractCegarLoop]: Abstraction has 21296 states and 55035 transitions. [2022-02-15 13:57:11,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21296 states and 55035 transitions. [2022-02-15 13:57:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:11,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:11,588 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:11,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-15 13:57:11,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-15 13:57:11,799 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2109118261, now seen corresponding path program 125 times [2022-02-15 13:57:11,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:11,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768995955] [2022-02-15 13:57:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:11,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:11,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768995955] [2022-02-15 13:57:11,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768995955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051718054] [2022-02-15 13:57:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:57:11,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:11,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:11,915 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:11,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 13:57:11,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-15 13:57:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:12,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051718054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:12,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:12,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-02-15 13:57:12,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792919975] [2022-02-15 13:57:12,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:12,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:12,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:12,451 INFO L87 Difference]: Start difference. First operand 21296 states and 55035 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:15,333 INFO L93 Difference]: Finished difference Result 27538 states and 68321 transitions. [2022-02-15 13:57:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 13:57:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:15,383 INFO L225 Difference]: With dead ends: 27538 [2022-02-15 13:57:15,383 INFO L226 Difference]: Without dead ends: 27538 [2022-02-15 13:57:15,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8770 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6130, Invalid=18050, Unknown=0, NotChecked=0, Total=24180 [2022-02-15 13:57:15,386 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 484 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:15,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 390 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:57:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27538 states. [2022-02-15 13:57:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27538 to 19476. [2022-02-15 13:57:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19476 states, 19475 states have (on average 2.5761232349165595) internal successors, (50170), 19475 states have internal predecessors, (50170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19476 states to 19476 states and 50170 transitions. [2022-02-15 13:57:15,809 INFO L78 Accepts]: Start accepts. Automaton has 19476 states and 50170 transitions. Word has length 40 [2022-02-15 13:57:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:15,810 INFO L470 AbstractCegarLoop]: Abstraction has 19476 states and 50170 transitions. [2022-02-15 13:57:15,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19476 states and 50170 transitions. [2022-02-15 13:57:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:15,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:15,822 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:15,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-15 13:57:16,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-15 13:57:16,022 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1390383217, now seen corresponding path program 126 times [2022-02-15 13:57:16,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:16,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046948596] [2022-02-15 13:57:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:16,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:16,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:16,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046948596] [2022-02-15 13:57:16,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046948596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:16,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394894781] [2022-02-15 13:57:16,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:57:16,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:16,151 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:16,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 13:57:16,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:57:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:16,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:16,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394894781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:16,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:16,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-02-15 13:57:16,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759116971] [2022-02-15 13:57:16,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:16,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:16,680 INFO L87 Difference]: Start difference. First operand 19476 states and 50170 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:18,575 INFO L93 Difference]: Finished difference Result 22442 states and 56490 transitions. [2022-02-15 13:57:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:57:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:18,608 INFO L225 Difference]: With dead ends: 22442 [2022-02-15 13:57:18,608 INFO L226 Difference]: Without dead ends: 22343 [2022-02-15 13:57:18,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3703, Invalid=12047, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 13:57:18,609 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 573 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:18,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 247 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:57:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-02-15 13:57:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 19294. [2022-02-15 13:57:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19294 states, 19293 states have (on average 2.5669932099725288) internal successors, (49525), 19293 states have internal predecessors, (49525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19294 states to 19294 states and 49525 transitions. [2022-02-15 13:57:18,965 INFO L78 Accepts]: Start accepts. Automaton has 19294 states and 49525 transitions. Word has length 40 [2022-02-15 13:57:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 19294 states and 49525 transitions. [2022-02-15 13:57:18,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19294 states and 49525 transitions. [2022-02-15 13:57:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:18,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:18,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:18,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-15 13:57:19,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:19,180 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash -991005643, now seen corresponding path program 127 times [2022-02-15 13:57:19,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:19,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223538146] [2022-02-15 13:57:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:19,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:19,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:19,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223538146] [2022-02-15 13:57:19,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223538146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:19,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45186088] [2022-02-15 13:57:19,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:57:19,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:19,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:19,289 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:19,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 13:57:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:19,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:19,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:19,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45186088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:19,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:19,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-02-15 13:57:19,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156996366] [2022-02-15 13:57:19,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:19,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:19,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:19,843 INFO L87 Difference]: Start difference. First operand 19294 states and 49525 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:22,973 INFO L93 Difference]: Finished difference Result 26530 states and 65364 transitions. [2022-02-15 13:57:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-15 13:57:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:23,020 INFO L225 Difference]: With dead ends: 26530 [2022-02-15 13:57:23,020 INFO L226 Difference]: Without dead ends: 26530 [2022-02-15 13:57:23,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11387 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7659, Invalid=20733, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 13:57:23,023 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 634 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:23,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 352 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:57:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2022-02-15 13:57:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 17898. [2022-02-15 13:57:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17898 states, 17897 states have (on average 2.5554003464267754) internal successors, (45734), 17897 states have internal predecessors, (45734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17898 states to 17898 states and 45734 transitions. [2022-02-15 13:57:23,393 INFO L78 Accepts]: Start accepts. Automaton has 17898 states and 45734 transitions. Word has length 40 [2022-02-15 13:57:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:23,393 INFO L470 AbstractCegarLoop]: Abstraction has 17898 states and 45734 transitions. [2022-02-15 13:57:23,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17898 states and 45734 transitions. [2022-02-15 13:57:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:23,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:23,405 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:23,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-15 13:57:23,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:23,606 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1966902385, now seen corresponding path program 128 times [2022-02-15 13:57:23,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:23,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526017393] [2022-02-15 13:57:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:23,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:23,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:23,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526017393] [2022-02-15 13:57:23,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526017393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:23,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445537847] [2022-02-15 13:57:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:57:23,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:23,703 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:23,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 13:57:23,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:57:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:24,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:24,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445537847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:24,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:24,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-02-15 13:57:24,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53319228] [2022-02-15 13:57:24,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:24,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:24,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:24,246 INFO L87 Difference]: Start difference. First operand 17898 states and 45734 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:25,909 INFO L93 Difference]: Finished difference Result 20487 states and 51579 transitions. [2022-02-15 13:57:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:57:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:25,950 INFO L225 Difference]: With dead ends: 20487 [2022-02-15 13:57:25,950 INFO L226 Difference]: Without dead ends: 20421 [2022-02-15 13:57:25,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3382, Invalid=10660, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 13:57:25,952 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 430 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 274 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:57:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20421 states. [2022-02-15 13:57:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20421 to 18251. [2022-02-15 13:57:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.5564383561643838) internal successors, (46655), 18250 states have internal predecessors, (46655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 46655 transitions. [2022-02-15 13:57:26,348 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 46655 transitions. Word has length 40 [2022-02-15 13:57:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:26,348 INFO L470 AbstractCegarLoop]: Abstraction has 18251 states and 46655 transitions. [2022-02-15 13:57:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 46655 transitions. [2022-02-15 13:57:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:26,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:26,360 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:26,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-15 13:57:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:26,561 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1115263285, now seen corresponding path program 129 times [2022-02-15 13:57:26,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:26,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055781067] [2022-02-15 13:57:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:26,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:26,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:26,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055781067] [2022-02-15 13:57:26,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055781067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:26,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031266812] [2022-02-15 13:57:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:57:26,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:26,664 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:26,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 13:57:26,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:57:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:26,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:27,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031266812] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:27,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:27,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 40 [2022-02-15 13:57:27,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229336057] [2022-02-15 13:57:27,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:27,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:27,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:27,239 INFO L87 Difference]: Start difference. First operand 18251 states and 46655 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:30,804 INFO L93 Difference]: Finished difference Result 26524 states and 65049 transitions. [2022-02-15 13:57:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-15 13:57:30,805 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:30,849 INFO L225 Difference]: With dead ends: 26524 [2022-02-15 13:57:30,849 INFO L226 Difference]: Without dead ends: 26524 [2022-02-15 13:57:30,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15320 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9859, Invalid=24923, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 13:57:30,850 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 685 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:30,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 403 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:57:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2022-02-15 13:57:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17253. [2022-02-15 13:57:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17253 states, 17252 states have (on average 2.541386505912358) internal successors, (43844), 17252 states have internal predecessors, (43844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17253 states to 17253 states and 43844 transitions. [2022-02-15 13:57:31,193 INFO L78 Accepts]: Start accepts. Automaton has 17253 states and 43844 transitions. Word has length 40 [2022-02-15 13:57:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:31,193 INFO L470 AbstractCegarLoop]: Abstraction has 17253 states and 43844 transitions. [2022-02-15 13:57:31,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 17253 states and 43844 transitions. [2022-02-15 13:57:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:31,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:31,205 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:31,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-15 13:57:31,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-15 13:57:31,406 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1118341233, now seen corresponding path program 130 times [2022-02-15 13:57:31,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:31,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993992105] [2022-02-15 13:57:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:31,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:31,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:31,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993992105] [2022-02-15 13:57:31,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993992105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:31,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857080408] [2022-02-15 13:57:31,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:57:31,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:31,511 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:31,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-15 13:57:31,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:57:31,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:31,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:32,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857080408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:32,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:32,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-02-15 13:57:32,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799012734] [2022-02-15 13:57:32,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:32,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:32,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:32,076 INFO L87 Difference]: Start difference. First operand 17253 states and 43844 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:33,933 INFO L93 Difference]: Finished difference Result 19251 states and 48390 transitions. [2022-02-15 13:57:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:57:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:33,958 INFO L225 Difference]: With dead ends: 19251 [2022-02-15 13:57:33,958 INFO L226 Difference]: Without dead ends: 19212 [2022-02-15 13:57:33,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3202, Invalid=9680, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:57:33,959 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 304 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:33,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 345 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:57:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19212 states. [2022-02-15 13:57:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19212 to 17619. [2022-02-15 13:57:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17619 states, 17618 states have (on average 2.546032466795323) internal successors, (44856), 17618 states have internal predecessors, (44856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17619 states to 17619 states and 44856 transitions. [2022-02-15 13:57:34,249 INFO L78 Accepts]: Start accepts. Automaton has 17619 states and 44856 transitions. Word has length 40 [2022-02-15 13:57:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:34,249 INFO L470 AbstractCegarLoop]: Abstraction has 17619 states and 44856 transitions. [2022-02-15 13:57:34,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17619 states and 44856 transitions. [2022-02-15 13:57:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:34,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:34,261 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:34,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-02-15 13:57:34,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 13:57:34,462 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash -232264139, now seen corresponding path program 131 times [2022-02-15 13:57:34,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:34,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845586337] [2022-02-15 13:57:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:34,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:34,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845586337] [2022-02-15 13:57:34,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845586337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088787351] [2022-02-15 13:57:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:57:34,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:34,566 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:34,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-15 13:57:34,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-15 13:57:34,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:34,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:34,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:35,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088787351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:35,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:35,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-02-15 13:57:35,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744503478] [2022-02-15 13:57:35,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:35,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:35,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:35,165 INFO L87 Difference]: Start difference. First operand 17619 states and 44856 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:39,043 INFO L93 Difference]: Finished difference Result 29040 states and 70961 transitions. [2022-02-15 13:57:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-15 13:57:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:39,092 INFO L225 Difference]: With dead ends: 29040 [2022-02-15 13:57:39,093 INFO L226 Difference]: Without dead ends: 29040 [2022-02-15 13:57:39,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19281 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11962, Invalid=29450, Unknown=0, NotChecked=0, Total=41412 [2022-02-15 13:57:39,096 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 648 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:39,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 459 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:57:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29040 states. [2022-02-15 13:57:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29040 to 22012. [2022-02-15 13:57:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22012 states, 22011 states have (on average 2.520875925673527) internal successors, (55487), 22011 states have internal predecessors, (55487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22012 states to 22012 states and 55487 transitions. [2022-02-15 13:57:39,543 INFO L78 Accepts]: Start accepts. Automaton has 22012 states and 55487 transitions. Word has length 40 [2022-02-15 13:57:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:39,543 INFO L470 AbstractCegarLoop]: Abstraction has 22012 states and 55487 transitions. [2022-02-15 13:57:39,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 22012 states and 55487 transitions. [2022-02-15 13:57:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:39,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:39,557 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:39,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-15 13:57:39,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 13:57:39,757 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 853771377, now seen corresponding path program 132 times [2022-02-15 13:57:39,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:39,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339818385] [2022-02-15 13:57:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:39,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:39,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:39,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339818385] [2022-02-15 13:57:39,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339818385] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:39,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676598012] [2022-02-15 13:57:39,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:57:39,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:39,849 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:39,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-15 13:57:39,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:57:39,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:40,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:40,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676598012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:40,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:40,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-02-15 13:57:40,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879554608] [2022-02-15 13:57:40,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:40,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:40,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:40,475 INFO L87 Difference]: Start difference. First operand 22012 states and 55487 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:42,014 INFO L93 Difference]: Finished difference Result 23071 states and 57669 transitions. [2022-02-15 13:57:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 13:57:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:42,050 INFO L225 Difference]: With dead ends: 23071 [2022-02-15 13:57:42,050 INFO L226 Difference]: Without dead ends: 23053 [2022-02-15 13:57:42,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3125, Invalid=9085, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:57:42,051 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 331 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:42,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 261 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:57:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-02-15 13:57:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 22214. [2022-02-15 13:57:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 22213 states have (on average 2.5227119254490615) internal successors, (56037), 22213 states have internal predecessors, (56037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 56037 transitions. [2022-02-15 13:57:42,400 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 56037 transitions. Word has length 40 [2022-02-15 13:57:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:42,400 INFO L470 AbstractCegarLoop]: Abstraction has 22214 states and 56037 transitions. [2022-02-15 13:57:42,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 56037 transitions. [2022-02-15 13:57:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:42,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:42,414 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:42,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-15 13:57:42,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-15 13:57:42,614 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2083943627, now seen corresponding path program 133 times [2022-02-15 13:57:42,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:42,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131097730] [2022-02-15 13:57:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:42,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:42,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:42,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131097730] [2022-02-15 13:57:42,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131097730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:42,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582493418] [2022-02-15 13:57:42,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:57:42,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:42,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:42,711 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:42,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-15 13:57:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:42,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:43,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582493418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:43,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:43,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 40 [2022-02-15 13:57:43,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311562783] [2022-02-15 13:57:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:43,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 13:57:43,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 13:57:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:57:43,334 INFO L87 Difference]: Start difference. First operand 22214 states and 56037 transitions. Second operand has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:47,575 INFO L93 Difference]: Finished difference Result 37816 states and 93511 transitions. [2022-02-15 13:57:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-02-15 13:57:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:47,654 INFO L225 Difference]: With dead ends: 37816 [2022-02-15 13:57:47,654 INFO L226 Difference]: Without dead ends: 37816 [2022-02-15 13:57:47,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23403 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13884, Invalid=35622, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 13:57:47,657 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 772 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:47,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 351 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:57:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37816 states. [2022-02-15 13:57:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37816 to 32904. [2022-02-15 13:57:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32904 states, 32903 states have (on average 2.529982068504392) internal successors, (83244), 32903 states have internal predecessors, (83244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32904 states to 32904 states and 83244 transitions. [2022-02-15 13:57:48,336 INFO L78 Accepts]: Start accepts. Automaton has 32904 states and 83244 transitions. Word has length 40 [2022-02-15 13:57:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:48,336 INFO L470 AbstractCegarLoop]: Abstraction has 32904 states and 83244 transitions. [2022-02-15 13:57:48,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 32904 states and 83244 transitions. [2022-02-15 13:57:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:48,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:48,354 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:48,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-15 13:57:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:48,555 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 265003035, now seen corresponding path program 134 times [2022-02-15 13:57:48,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:48,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103632217] [2022-02-15 13:57:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:48,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:48,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:48,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103632217] [2022-02-15 13:57:48,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103632217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:48,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616311666] [2022-02-15 13:57:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:57:48,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:48,644 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:48,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-15 13:57:48,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:57:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:49,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616311666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:49,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:49,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-02-15 13:57:49,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969897246] [2022-02-15 13:57:49,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:49,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:49,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:49,259 INFO L87 Difference]: Start difference. First operand 32904 states and 83244 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:51,868 INFO L93 Difference]: Finished difference Result 35887 states and 89458 transitions. [2022-02-15 13:57:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-15 13:57:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:51,936 INFO L225 Difference]: With dead ends: 35887 [2022-02-15 13:57:51,936 INFO L226 Difference]: Without dead ends: 35883 [2022-02-15 13:57:51,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8367 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6364, Invalid=16588, Unknown=0, NotChecked=0, Total=22952 [2022-02-15 13:57:51,939 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 725 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:51,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 159 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:57:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35883 states. [2022-02-15 13:57:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35883 to 32269. [2022-02-15 13:57:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32269 states, 32268 states have (on average 2.526465848518656) internal successors, (81524), 32268 states have internal predecessors, (81524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32269 states to 32269 states and 81524 transitions. [2022-02-15 13:57:52,706 INFO L78 Accepts]: Start accepts. Automaton has 32269 states and 81524 transitions. Word has length 40 [2022-02-15 13:57:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 32269 states and 81524 transitions. [2022-02-15 13:57:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32269 states and 81524 transitions. [2022-02-15 13:57:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:52,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:52,724 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:52,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-15 13:57:52,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-15 13:57:52,924 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash -241343231, now seen corresponding path program 135 times [2022-02-15 13:57:52,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:52,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549543486] [2022-02-15 13:57:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:52,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:53,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:53,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549543486] [2022-02-15 13:57:53,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549543486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:53,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905085131] [2022-02-15 13:57:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:57:53,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:53,028 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:53,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-15 13:57:53,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:57:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:53,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:53,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905085131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:53,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:53,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-02-15 13:57:53,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95176224] [2022-02-15 13:57:53,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:53,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:53,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:53,616 INFO L87 Difference]: Start difference. First operand 32269 states and 81524 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:55,948 INFO L93 Difference]: Finished difference Result 36401 states and 90806 transitions. [2022-02-15 13:57:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 13:57:55,949 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:56,014 INFO L225 Difference]: With dead ends: 36401 [2022-02-15 13:57:56,014 INFO L226 Difference]: Without dead ends: 36389 [2022-02-15 13:57:56,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5437, Invalid=14585, Unknown=0, NotChecked=0, Total=20022 [2022-02-15 13:57:56,016 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 721 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:56,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 162 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:57:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36389 states. [2022-02-15 13:57:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36389 to 31831. [2022-02-15 13:57:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31831 states, 31830 states have (on average 2.527615457115928) internal successors, (80454), 31830 states have internal predecessors, (80454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31831 states to 31831 states and 80454 transitions. [2022-02-15 13:57:56,753 INFO L78 Accepts]: Start accepts. Automaton has 31831 states and 80454 transitions. Word has length 40 [2022-02-15 13:57:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:57:56,753 INFO L470 AbstractCegarLoop]: Abstraction has 31831 states and 80454 transitions. [2022-02-15 13:57:56,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31831 states and 80454 transitions. [2022-02-15 13:57:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:57:56,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:57:56,773 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:57:56,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-15 13:57:56,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:56,973 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:57:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:57:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -468564611, now seen corresponding path program 136 times [2022-02-15 13:57:56,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:57:56,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960768739] [2022-02-15 13:57:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:57:56,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:57:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:57:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:57:57,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:57:57,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960768739] [2022-02-15 13:57:57,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960768739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:57:57,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115872073] [2022-02-15 13:57:57,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:57:57,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:57:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:57:57,143 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:57:57,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-15 13:57:57,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:57:57,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:57:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:57:57,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:57:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:57,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:57:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:57:57,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115872073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:57:57,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:57:57,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-02-15 13:57:57,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920875839] [2022-02-15 13:57:57,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:57:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:57:57,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:57:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:57:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:57:57,715 INFO L87 Difference]: Start difference. First operand 31831 states and 80454 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:57:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:57:59,908 INFO L93 Difference]: Finished difference Result 37561 states and 93690 transitions. [2022-02-15 13:57:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:57:59,908 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:57:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:57:59,974 INFO L225 Difference]: With dead ends: 37561 [2022-02-15 13:57:59,974 INFO L226 Difference]: Without dead ends: 37541 [2022-02-15 13:57:59,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4822, Invalid=13268, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 13:57:59,976 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 608 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:57:59,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 189 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:58:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37541 states. [2022-02-15 13:58:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37541 to 32042. [2022-02-15 13:58:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32042 states, 32041 states have (on average 2.529758746605911) internal successors, (81056), 32041 states have internal predecessors, (81056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32042 states to 32042 states and 81056 transitions. [2022-02-15 13:58:00,658 INFO L78 Accepts]: Start accepts. Automaton has 32042 states and 81056 transitions. Word has length 40 [2022-02-15 13:58:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:00,658 INFO L470 AbstractCegarLoop]: Abstraction has 32042 states and 81056 transitions. [2022-02-15 13:58:00,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 32042 states and 81056 transitions. [2022-02-15 13:58:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:58:00,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:00,674 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:00,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-15 13:58:00,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:00,874 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash 215021305, now seen corresponding path program 137 times [2022-02-15 13:58:00,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:00,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955947093] [2022-02-15 13:58:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:00,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:00,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:00,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955947093] [2022-02-15 13:58:00,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955947093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:00,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132826291] [2022-02-15 13:58:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:58:00,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:00,976 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:00,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-15 13:58:01,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-15 13:58:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:58:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:01,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132826291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:01,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:01,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-02-15 13:58:01,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992252330] [2022-02-15 13:58:01,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:01,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:58:01,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:58:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:58:01,543 INFO L87 Difference]: Start difference. First operand 32042 states and 81056 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:03,605 INFO L93 Difference]: Finished difference Result 39838 states and 99403 transitions. [2022-02-15 13:58:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:58:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:58:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:03,779 INFO L225 Difference]: With dead ends: 39838 [2022-02-15 13:58:03,780 INFO L226 Difference]: Without dead ends: 39810 [2022-02-15 13:58:03,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4483, Invalid=12547, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 13:58:03,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 664 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:03,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 186 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39810 states. [2022-02-15 13:58:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39810 to 33837. [2022-02-15 13:58:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33837 states, 33836 states have (on average 2.535997162785199) internal successors, (85808), 33836 states have internal predecessors, (85808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33837 states to 33837 states and 85808 transitions. [2022-02-15 13:58:04,448 INFO L78 Accepts]: Start accepts. Automaton has 33837 states and 85808 transitions. Word has length 40 [2022-02-15 13:58:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 33837 states and 85808 transitions. [2022-02-15 13:58:04,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33837 states and 85808 transitions. [2022-02-15 13:58:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:58:04,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:04,467 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:04,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-15 13:58:04,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:04,668 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 11090293, now seen corresponding path program 138 times [2022-02-15 13:58:04,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:04,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116390726] [2022-02-15 13:58:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:04,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:04,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:04,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116390726] [2022-02-15 13:58:04,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116390726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:04,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070686838] [2022-02-15 13:58:04,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:58:04,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:04,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:04,774 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:04,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-15 13:58:04,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-15 13:58:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:58:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:05,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:05,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070686838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:05,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:05,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-02-15 13:58:05,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999286811] [2022-02-15 13:58:05,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:05,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:58:05,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:58:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:58:05,304 INFO L87 Difference]: Start difference. First operand 33837 states and 85808 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:07,524 INFO L93 Difference]: Finished difference Result 43908 states and 109576 transitions. [2022-02-15 13:58:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 13:58:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:58:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:07,604 INFO L225 Difference]: With dead ends: 43908 [2022-02-15 13:58:07,604 INFO L226 Difference]: Without dead ends: 43872 [2022-02-15 13:58:07,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5548 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4373, Invalid=12397, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 13:58:07,605 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 873 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:07,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 147 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43872 states. [2022-02-15 13:58:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43872 to 40323. [2022-02-15 13:58:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40323 states, 40322 states have (on average 2.537894945687218) internal successors, (102333), 40322 states have internal predecessors, (102333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40323 states to 40323 states and 102333 transitions. [2022-02-15 13:58:08,402 INFO L78 Accepts]: Start accepts. Automaton has 40323 states and 102333 transitions. Word has length 40 [2022-02-15 13:58:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:08,403 INFO L470 AbstractCegarLoop]: Abstraction has 40323 states and 102333 transitions. [2022-02-15 13:58:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40323 states and 102333 transitions. [2022-02-15 13:58:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:58:08,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:08,424 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:08,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-15 13:58:08,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:08,624 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1601883377, now seen corresponding path program 139 times [2022-02-15 13:58:08,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:08,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241581567] [2022-02-15 13:58:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:08,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:08,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:08,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241581567] [2022-02-15 13:58:08,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241581567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:08,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340114018] [2022-02-15 13:58:08,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:58:08,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:08,737 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:08,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-15 13:58:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:58:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:09,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:09,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340114018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:09,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:09,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-02-15 13:58:09,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688346506] [2022-02-15 13:58:09,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:09,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:58:09,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:58:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:58:09,250 INFO L87 Difference]: Start difference. First operand 40323 states and 102333 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:11,529 INFO L93 Difference]: Finished difference Result 50681 states and 126374 transitions. [2022-02-15 13:58:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:58:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:58:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:11,636 INFO L225 Difference]: With dead ends: 50681 [2022-02-15 13:58:11,636 INFO L226 Difference]: Without dead ends: 50637 [2022-02-15 13:58:11,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5786 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4453, Invalid=12839, Unknown=0, NotChecked=0, Total=17292 [2022-02-15 13:58:11,637 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 689 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:11,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 211 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50637 states. [2022-02-15 13:58:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50637 to 46817. [2022-02-15 13:58:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46817 states, 46816 states have (on average 2.533685064935065) internal successors, (118617), 46816 states have internal predecessors, (118617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46817 states to 46817 states and 118617 transitions. [2022-02-15 13:58:12,737 INFO L78 Accepts]: Start accepts. Automaton has 46817 states and 118617 transitions. Word has length 40 [2022-02-15 13:58:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:12,738 INFO L470 AbstractCegarLoop]: Abstraction has 46817 states and 118617 transitions. [2022-02-15 13:58:12,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46817 states and 118617 transitions. [2022-02-15 13:58:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 13:58:12,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:12,761 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:12,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-15 13:58:12,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-15 13:58:12,961 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1345679725, now seen corresponding path program 140 times [2022-02-15 13:58:12,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:12,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456328237] [2022-02-15 13:58:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:12,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:13,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:13,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456328237] [2022-02-15 13:58:13,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456328237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:13,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51867336] [2022-02-15 13:58:13,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:58:13,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:13,084 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:13,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-15 13:58:13,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:58:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-15 13:58:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:13,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51867336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:13,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:13,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-02-15 13:58:13,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607139401] [2022-02-15 13:58:13,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:13,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:58:13,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:58:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:58:13,670 INFO L87 Difference]: Start difference. First operand 46817 states and 118617 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:15,650 INFO L93 Difference]: Finished difference Result 50538 states and 126417 transitions. [2022-02-15 13:58:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 13:58:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-15 13:58:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:15,772 INFO L225 Difference]: With dead ends: 50538 [2022-02-15 13:58:15,773 INFO L226 Difference]: Without dead ends: 50486 [2022-02-15 13:58:15,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3949, Invalid=11551, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 13:58:15,774 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 756 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:15,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 210 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50486 states. [2022-02-15 13:58:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50486 to 46981. [2022-02-15 13:58:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46981 states, 46980 states have (on average 2.5367177522349937) internal successors, (119175), 46980 states have internal predecessors, (119175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46981 states to 46981 states and 119175 transitions. [2022-02-15 13:58:16,855 INFO L78 Accepts]: Start accepts. Automaton has 46981 states and 119175 transitions. Word has length 40 [2022-02-15 13:58:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:16,855 INFO L470 AbstractCegarLoop]: Abstraction has 46981 states and 119175 transitions. [2022-02-15 13:58:16,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46981 states and 119175 transitions. [2022-02-15 13:58:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:16,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:16,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:16,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-15 13:58:17,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-15 13:58:17,090 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 843909491, now seen corresponding path program 141 times [2022-02-15 13:58:17,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:17,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525392200] [2022-02-15 13:58:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:17,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:17,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:17,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525392200] [2022-02-15 13:58:17,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525392200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:17,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633280448] [2022-02-15 13:58:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:58:17,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:17,156 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:17,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-15 13:58:17,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:58:17,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:58:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:18,109 INFO L353 Elim1Store]: treesize reduction 1013, result has 21.9 percent of original size [2022-02-15 13:58:18,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 224 treesize of output 373 [2022-02-15 13:58:18,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:18,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 27 case distinctions, treesize of input 489 treesize of output 283 [2022-02-15 13:58:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:19,217 INFO L353 Elim1Store]: treesize reduction 128, result has 43.1 percent of original size [2022-02-15 13:58:19,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 232 treesize of output 214 [2022-02-15 13:58:19,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:19,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 296 [2022-02-15 13:58:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:58:19,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633280448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:19,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:19,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-02-15 13:58:19,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756627703] [2022-02-15 13:58:19,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:58:19,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:58:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:58:19,822 INFO L87 Difference]: Start difference. First operand 46981 states and 119175 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:20,412 INFO L93 Difference]: Finished difference Result 50429 states and 127823 transitions. [2022-02-15 13:58:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:58:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 13:58:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:20,521 INFO L225 Difference]: With dead ends: 50429 [2022-02-15 13:58:20,521 INFO L226 Difference]: Without dead ends: 50422 [2022-02-15 13:58:20,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:58:20,521 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 232 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:20,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1293 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50422 states. [2022-02-15 13:58:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50422 to 49976. [2022-02-15 13:58:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49976 states, 49975 states have (on average 2.542091045522761) internal successors, (127041), 49975 states have internal predecessors, (127041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49976 states to 49976 states and 127041 transitions. [2022-02-15 13:58:21,670 INFO L78 Accepts]: Start accepts. Automaton has 49976 states and 127041 transitions. Word has length 42 [2022-02-15 13:58:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:21,670 INFO L470 AbstractCegarLoop]: Abstraction has 49976 states and 127041 transitions. [2022-02-15 13:58:21,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 49976 states and 127041 transitions. [2022-02-15 13:58:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:21,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:21,708 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:21,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-15 13:58:21,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:21,909 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1417483661, now seen corresponding path program 142 times [2022-02-15 13:58:21,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:21,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637939625] [2022-02-15 13:58:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:21,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:58:21,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:21,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637939625] [2022-02-15 13:58:21,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637939625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:21,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274206721] [2022-02-15 13:58:21,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:58:21,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:21,961 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:21,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-15 13:58:21,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:58:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:58:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:22,767 INFO L353 Elim1Store]: treesize reduction 749, result has 24.4 percent of original size [2022-02-15 13:58:22,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 316 [2022-02-15 13:58:22,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:22,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 409 treesize of output 286 [2022-02-15 13:58:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:23,408 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-15 13:58:23,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 196 treesize of output 190 [2022-02-15 13:58:23,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:23,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 460 treesize of output 296 [2022-02-15 13:58:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:23,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274206721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:23,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:23,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 35 [2022-02-15 13:58:23,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903427363] [2022-02-15 13:58:23,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:23,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:58:23,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:58:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:58:23,816 INFO L87 Difference]: Start difference. First operand 49976 states and 127041 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:24,414 INFO L93 Difference]: Finished difference Result 52344 states and 132850 transitions. [2022-02-15 13:58:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:58:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 13:58:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:24,528 INFO L225 Difference]: With dead ends: 52344 [2022-02-15 13:58:24,528 INFO L226 Difference]: Without dead ends: 52328 [2022-02-15 13:58:24,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:58:24,528 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 265 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:24,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1357 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:58:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52328 states. [2022-02-15 13:58:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52328 to 51480. [2022-02-15 13:58:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51480 states, 51479 states have (on average 2.547854464927446) internal successors, (131161), 51479 states have internal predecessors, (131161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51480 states to 51480 states and 131161 transitions. [2022-02-15 13:58:25,668 INFO L78 Accepts]: Start accepts. Automaton has 51480 states and 131161 transitions. Word has length 42 [2022-02-15 13:58:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:25,668 INFO L470 AbstractCegarLoop]: Abstraction has 51480 states and 131161 transitions. [2022-02-15 13:58:25,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51480 states and 131161 transitions. [2022-02-15 13:58:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:25,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:25,701 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:25,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-15 13:58:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-15 13:58:25,901 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1200959117, now seen corresponding path program 143 times [2022-02-15 13:58:25,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:25,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588711445] [2022-02-15 13:58:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:25,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:58:25,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:25,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588711445] [2022-02-15 13:58:25,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588711445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:25,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443779529] [2022-02-15 13:58:25,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:58:25,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:25,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:25,951 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:25,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-15 13:58:25,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-02-15 13:58:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-15 13:58:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:26,502 INFO L353 Elim1Store]: treesize reduction 534, result has 27.9 percent of original size [2022-02-15 13:58:26,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 201 treesize of output 273 [2022-02-15 13:58:27,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:27,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 359 treesize of output 286 [2022-02-15 13:58:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:27,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:27,681 INFO L353 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2022-02-15 13:58:27,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 212 treesize of output 218 [2022-02-15 13:58:27,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:27,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 486 treesize of output 296 [2022-02-15 13:58:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:28,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443779529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:28,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:28,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 34 [2022-02-15 13:58:28,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904051144] [2022-02-15 13:58:28,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:58:28,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:58:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:58:28,182 INFO L87 Difference]: Start difference. First operand 51480 states and 131161 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:28,907 INFO L93 Difference]: Finished difference Result 53659 states and 136592 transitions. [2022-02-15 13:58:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:58:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 13:58:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:29,024 INFO L225 Difference]: With dead ends: 53659 [2022-02-15 13:58:29,025 INFO L226 Difference]: Without dead ends: 53634 [2022-02-15 13:58:29,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:58:29,025 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 210 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1864 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1390 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2022-02-15 13:58:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53634 states. [2022-02-15 13:58:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53634 to 52433. [2022-02-15 13:58:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52433 states, 52432 states have (on average 2.5524679584986267) internal successors, (133831), 52432 states have internal predecessors, (133831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52433 states to 52433 states and 133831 transitions. [2022-02-15 13:58:30,177 INFO L78 Accepts]: Start accepts. Automaton has 52433 states and 133831 transitions. Word has length 42 [2022-02-15 13:58:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 52433 states and 133831 transitions. [2022-02-15 13:58:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 52433 states and 133831 transitions. [2022-02-15 13:58:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:30,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:30,215 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:30,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-15 13:58:30,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-15 13:58:30,415 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash 720697459, now seen corresponding path program 144 times [2022-02-15 13:58:30,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:30,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52644312] [2022-02-15 13:58:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:30,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:58:30,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:30,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52644312] [2022-02-15 13:58:30,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52644312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:30,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462202865] [2022-02-15 13:58:30,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:58:30,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:30,463 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:30,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-15 13:58:30,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-02-15 13:58:30,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:30,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:58:30,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:31,086 INFO L353 Elim1Store]: treesize reduction 469, result has 26.8 percent of original size [2022-02-15 13:58:31,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 55 case distinctions, treesize of input 272 treesize of output 254 [2022-02-15 13:58:31,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:31,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-02-15 13:58:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:31,776 INFO L353 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2022-02-15 13:58:31,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 220 treesize of output 242 [2022-02-15 13:58:31,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:31,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-02-15 13:58:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:32,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462202865] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:32,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:32,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-02-15 13:58:32,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549002762] [2022-02-15 13:58:32,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:32,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:58:32,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:58:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:58:32,262 INFO L87 Difference]: Start difference. First operand 52433 states and 133831 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:33,009 INFO L93 Difference]: Finished difference Result 54610 states and 139489 transitions. [2022-02-15 13:58:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:58:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 13:58:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:33,126 INFO L225 Difference]: With dead ends: 54610 [2022-02-15 13:58:33,127 INFO L226 Difference]: Without dead ends: 54588 [2022-02-15 13:58:33,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:58:33,127 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 237 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:33,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1602 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:58:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54588 states. [2022-02-15 13:58:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54588 to 53500. [2022-02-15 13:58:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53500 states, 53499 states have (on average 2.556926297687807) internal successors, (136793), 53499 states have internal predecessors, (136793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53500 states to 53500 states and 136793 transitions. [2022-02-15 13:58:34,219 INFO L78 Accepts]: Start accepts. Automaton has 53500 states and 136793 transitions. Word has length 42 [2022-02-15 13:58:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:34,219 INFO L470 AbstractCegarLoop]: Abstraction has 53500 states and 136793 transitions. [2022-02-15 13:58:34,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 53500 states and 136793 transitions. [2022-02-15 13:58:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:34,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:34,259 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:34,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-15 13:58:34,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-15 13:58:34,459 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash 596729715, now seen corresponding path program 145 times [2022-02-15 13:58:34,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:34,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443849646] [2022-02-15 13:58:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:34,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:58:34,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:34,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443849646] [2022-02-15 13:58:34,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443849646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:34,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615687364] [2022-02-15 13:58:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:58:34,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:34,508 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:34,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-15 13:58:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:34,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:58:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:34,890 INFO L353 Elim1Store]: treesize reduction 240, result has 37.7 percent of original size [2022-02-15 13:58:34,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 205 treesize of output 201 [2022-02-15 13:58:45,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:45,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 303 treesize of output 286 [2022-02-15 13:58:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:45,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:58:46,055 INFO L353 Elim1Store]: treesize reduction 252, result has 30.2 percent of original size [2022-02-15 13:58:46,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 220 treesize of output 262 [2022-02-15 13:58:46,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:58:46,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-02-15 13:58:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:58:46,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615687364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:58:46,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:58:46,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 32 [2022-02-15 13:58:46,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016422620] [2022-02-15 13:58:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:58:46,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:58:46,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:58:46,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:58:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:58:46,443 INFO L87 Difference]: Start difference. First operand 53500 states and 136793 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:58:47,035 INFO L93 Difference]: Finished difference Result 56164 states and 143597 transitions. [2022-02-15 13:58:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:58:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 13:58:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:58:47,154 INFO L225 Difference]: With dead ends: 56164 [2022-02-15 13:58:47,154 INFO L226 Difference]: Without dead ends: 56131 [2022-02-15 13:58:47,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:58:47,154 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 212 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:58:47,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1783 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1035 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-02-15 13:58:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56131 states. [2022-02-15 13:58:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56131 to 54544. [2022-02-15 13:58:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54544 states, 54543 states have (on average 2.5606402288102963) internal successors, (139665), 54543 states have internal predecessors, (139665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54544 states to 54544 states and 139665 transitions. [2022-02-15 13:58:48,397 INFO L78 Accepts]: Start accepts. Automaton has 54544 states and 139665 transitions. Word has length 42 [2022-02-15 13:58:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:58:48,397 INFO L470 AbstractCegarLoop]: Abstraction has 54544 states and 139665 transitions. [2022-02-15 13:58:48,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:58:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 54544 states and 139665 transitions. [2022-02-15 13:58:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 13:58:48,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:58:48,436 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:58:48,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-15 13:58:48,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:48,637 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:58:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:58:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1722812019, now seen corresponding path program 146 times [2022-02-15 13:58:48,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:58:48,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77380529] [2022-02-15 13:58:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:58:48,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:58:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:58:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:58:48,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:58:48,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77380529] [2022-02-15 13:58:48,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77380529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:58:48,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503597783] [2022-02-15 13:58:48,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:58:48,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:58:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:58:48,690 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:58:48,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-15 13:58:48,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:58:48,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:58:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:58:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:58:49,034 INFO L353 Elim1Store]: treesize reduction 137, result has 48.7 percent of original size [2022-02-15 13:58:49,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 184 [2022-02-15 14:02:15,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:02:15,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 345 treesize of output 286 [2022-02-15 14:02:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:02:15,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:02:15,661 INFO L353 Elim1Store]: treesize reduction 328, result has 25.6 percent of original size [2022-02-15 14:02:15,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 212 treesize of output 278 [2022-02-15 14:02:15,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:02:15,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 296 [2022-02-15 14:02:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:02:16,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503597783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:02:16,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:02:16,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 31 [2022-02-15 14:02:16,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557332961] [2022-02-15 14:02:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:02:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 14:02:16,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:02:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 14:02:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-15 14:02:16,193 INFO L87 Difference]: Start difference. First operand 54544 states and 139665 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:02:16,735 INFO L93 Difference]: Finished difference Result 57230 states and 146445 transitions. [2022-02-15 14:02:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:02:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 14:02:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:02:16,862 INFO L225 Difference]: With dead ends: 57230 [2022-02-15 14:02:16,862 INFO L226 Difference]: Without dead ends: 57193 [2022-02-15 14:02:16,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-15 14:02:16,862 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 221 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:02:16,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1841 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 916 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2022-02-15 14:02:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57193 states. [2022-02-15 14:02:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57193 to 55615. [2022-02-15 14:02:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55615 states, 55614 states have (on average 2.5645700722839573) internal successors, (142626), 55614 states have internal predecessors, (142626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55615 states to 55615 states and 142626 transitions. [2022-02-15 14:02:18,153 INFO L78 Accepts]: Start accepts. Automaton has 55615 states and 142626 transitions. Word has length 42 [2022-02-15 14:02:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:02:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 55615 states and 142626 transitions. [2022-02-15 14:02:18,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 55615 states and 142626 transitions. [2022-02-15 14:02:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 14:02:18,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:02:18,197 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:02:18,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-15 14:02:18,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:02:18,397 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:02:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:02:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1556147571, now seen corresponding path program 147 times [2022-02-15 14:02:18,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:02:18,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690515463] [2022-02-15 14:02:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:02:18,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:02:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:02:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:02:18,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:02:18,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690515463] [2022-02-15 14:02:18,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690515463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:02:18,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702763705] [2022-02-15 14:02:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:02:18,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:02:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:02:18,450 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:02:18,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-15 14:02:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-15 14:02:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:02:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-15 14:02:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:02:19,396 INFO L353 Elim1Store]: treesize reduction 130, result has 45.6 percent of original size [2022-02-15 14:02:19,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 248 treesize of output 203 [2022-02-15 14:02:19,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:02:19,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 447 treesize of output 286 [2022-02-15 14:02:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:02:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:02:20,732 INFO L353 Elim1Store]: treesize reduction 412, result has 22.1 percent of original size [2022-02-15 14:02:20,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 196 treesize of output 290 [2022-02-15 14:02:20,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:02:20,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 494 treesize of output 296 [2022-02-15 14:02:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:02:21,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702763705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:02:21,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:02:21,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-02-15 14:02:21,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214140677] [2022-02-15 14:02:21,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:02:21,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 14:02:21,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:02:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 14:02:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:02:21,352 INFO L87 Difference]: Start difference. First operand 55615 states and 142626 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:02:22,070 INFO L93 Difference]: Finished difference Result 58040 states and 148792 transitions. [2022-02-15 14:02:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 14:02:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-02-15 14:02:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:02:22,211 INFO L225 Difference]: With dead ends: 58040 [2022-02-15 14:02:22,211 INFO L226 Difference]: Without dead ends: 58006 [2022-02-15 14:02:22,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 14:02:22,212 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 334 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:02:22,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1445 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:02:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58006 states. [2022-02-15 14:02:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58006 to 56750. [2022-02-15 14:02:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56750 states, 56749 states have (on average 2.5700364764136814) internal successors, (145847), 56749 states have internal predecessors, (145847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56750 states to 56750 states and 145847 transitions. [2022-02-15 14:02:23,719 INFO L78 Accepts]: Start accepts. Automaton has 56750 states and 145847 transitions. Word has length 42 [2022-02-15 14:02:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:02:23,719 INFO L470 AbstractCegarLoop]: Abstraction has 56750 states and 145847 transitions. [2022-02-15 14:02:23,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:02:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 56750 states and 145847 transitions. [2022-02-15 14:02:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 14:02:23,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:02:23,761 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:02:23,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-15 14:02:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:02:23,975 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:02:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:02:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash 305402995, now seen corresponding path program 148 times [2022-02-15 14:02:23,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:02:23,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984774066] [2022-02-15 14:02:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:02:23,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:02:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:02:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 14:02:24,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:02:24,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984774066] [2022-02-15 14:02:24,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984774066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:02:24,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100673764] [2022-02-15 14:02:24,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:02:24,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:02:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:02:24,037 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:02:24,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-15 14:02:24,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:02:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:02:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 14:02:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:02:24,467 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-02-15 14:02:24,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 Received shutdown request... [2022-02-15 14:04:34,883 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-15 14:04:34,884 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 14:04:34,890 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:04:34,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-15 14:04:34,900 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 [2022-02-15 14:04:35,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:04:35,085 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 8 for 14ms.. [2022-02-15 14:04:35,086 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 14:04:35,086 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 14:04:35,088 INFO L732 BasicCegarLoop]: Path program histogram: [148, 2, 2, 1] [2022-02-15 14:04:35,089 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:04:35,090 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:04:35,091 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:04:35 BasicIcfg [2022-02-15 14:04:35,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:04:35,091 INFO L158 Benchmark]: Toolchain (without parser) took 785574.06ms. Allocated memory was 209.7MB in the beginning and 4.6GB in the end (delta: 4.4GB). Free memory was 178.8MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 209.7MB. Free memory is still 180.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.50ms. Allocated memory is still 209.7MB. Free memory was 178.7MB in the beginning and 177.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 INFO L158 Benchmark]: Boogie Preprocessor took 12.26ms. Allocated memory is still 209.7MB. Free memory was 177.3MB in the beginning and 176.3MB in the end (delta: 957.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 INFO L158 Benchmark]: RCFGBuilder took 146.36ms. Allocated memory is still 209.7MB. Free memory was 176.2MB in the beginning and 167.0MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 INFO L158 Benchmark]: TraceAbstraction took 785392.07ms. Allocated memory was 209.7MB in the beginning and 4.6GB in the end (delta: 4.4GB). Free memory was 166.6MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-02-15 14:04:35,091 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 209.7MB. Free memory is still 180.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.50ms. Allocated memory is still 209.7MB. Free memory was 178.7MB in the beginning and 177.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.26ms. Allocated memory is still 209.7MB. Free memory was 177.3MB in the beginning and 176.3MB in the end (delta: 957.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 146.36ms. Allocated memory is still 209.7MB. Free memory was 176.2MB in the beginning and 167.0MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 785392.07ms. Allocated memory was 209.7MB in the beginning and 4.6GB in the end (delta: 4.4GB). Free memory was 166.6MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.8GB. 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: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 8 for 14ms.. - TimeoutResultAtElement [Line: 48]: 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 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 8 for 14ms.. - TimeoutResultAtElement [Line: 48]: 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 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 8 for 14ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 785.3s, OverallIterations: 153, TraceHistogramMax: 7, PathProgramHistogramMax: 148, EmptinessCheckTime: 1.3s, AutomataDifference: 166.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51181 SdHoareTripleChecker+Valid, 42.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51181 mSDsluCounter, 53372 SdHoareTripleChecker+Invalid, 35.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2348 IncrementalHoareTripleChecker+Unchecked, 69899 mSDsCounter, 13451 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 96328 IncrementalHoareTripleChecker+Invalid, 112127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13451 mSolverCounterUnsat, 4721 mSDtfsCounter, 96328 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18403 GetRequests, 7206 SyntacticMatches, 103 SemanticMatches, 11094 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431831 ImplicationChecksByTransitivity, 141.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56750occurred in iteration=152, InterpolantAutomatonStates: 8393, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 36.2s AutomataMinimizationTime, 152 MinimizatonAttempts, 267799 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 415.4s InterpolantComputationTime, 9664 NumberOfCodeBlocks, 9664 NumberOfCodeBlocksAsserted, 747 NumberOfCheckSat, 14010 ConstructedInterpolants, 107 QuantifiedInterpolants, 181780 SizeOfPredicates, 916 NumberOfNonLiveVariables, 13685 ConjunctsInSsa, 2723 ConjunctsInUnsatCore, 446 InterpolantComputations, 6 PerfectInterpolantSequences, 7556/21626 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