/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/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:41:12,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:41:12,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:41:13,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:41:13,077 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 13:41:13,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:41:13,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:41:13,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:41:13,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:41:13,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:41:13,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:41:13,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:41:13,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:41:13,103 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:41:13,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:41:13,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:41:13,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:41:13,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:41:13,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:41:13,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:41:13,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:41:13,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:41:13,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:41:13,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:41:13,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:41:13,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:41:13,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:41:13,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:41:13,307 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:41:13,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2022-02-15 13:41:13,308 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2022-02-15 13:41:13,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:41:13,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:41:13,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:41:13,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:41:13,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:41:13,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,349 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:41:13,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:41:13,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:41:13,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:41:13,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:41:13,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:41:13,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:41:13,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:41:13,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:41:13,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/1) ... [2022-02-15 13:41:13,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:41:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:13,412 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 13:41:13,421 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 13:41:13,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:41:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:41:13,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:41:13,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:41:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:41:13,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:41:13,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:41:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:41:13,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:41:13,453 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 13:41:13,502 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:41:13,503 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:41:13,617 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:41:13,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:41:13,622 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 13:41:13,623 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:41:13 BoogieIcfgContainer [2022-02-15 13:41:13,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:41:13,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:41:13,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:41:13,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:41:13,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:41:13" (1/2) ... [2022-02-15 13:41:13,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb1825 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:41:13, skipping insertion in model container [2022-02-15 13:41:13,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:41:13" (2/2) ... [2022-02-15 13:41:13,643 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2022-02-15 13:41:13,646 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:41:13,646 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:41:13,646 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:41:13,646 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:41:13,668 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 13:41:13,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:41:13,698 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 13:41:13,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 13:41:13,704 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2022-02-15 13:41:13,727 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 13:41:13,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:13,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:13,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -658757211, now seen corresponding path program 1 times [2022-02-15 13:41:13,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:13,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966188701] [2022-02-15 13:41:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:13,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:14,015 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 13:41:14,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:14,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966188701] [2022-02-15 13:41:14,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966188701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:41:14,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:41:14,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:41:14,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761963665] [2022-02-15 13:41:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:41:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:41:14,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:41:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:41:14,054 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:14,195 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2022-02-15 13:41:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:41:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 13:41:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:14,228 INFO L225 Difference]: With dead ends: 299 [2022-02-15 13:41:14,229 INFO L226 Difference]: Without dead ends: 286 [2022-02-15 13:41:14,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:14,236 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:14,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 55 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-15 13:41:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2022-02-15 13:41:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2022-02-15 13:41:14,293 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2022-02-15 13:41:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:14,294 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2022-02-15 13:41:14,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2022-02-15 13:41:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:41:14,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:14,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:14,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:41:14,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1900646624, now seen corresponding path program 1 times [2022-02-15 13:41:14,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:14,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141373253] [2022-02-15 13:41:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:14,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:14,370 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 13:41:14,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:14,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141373253] [2022-02-15 13:41:14,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141373253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:14,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673974748] [2022-02-15 13:41:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:14,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:14,377 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 13:41:14,405 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 13:41:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:14,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 13:41:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:14,514 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 13:41:14,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:14,596 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 13:41:14,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673974748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:14,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:14,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-15 13:41:14,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123095463] [2022-02-15 13:41:14,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:14,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:14,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:14,598 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:14,712 INFO L93 Difference]: Finished difference Result 274 states and 579 transitions. [2022-02-15 13:41:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:41:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:41:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:14,715 INFO L225 Difference]: With dead ends: 274 [2022-02-15 13:41:14,715 INFO L226 Difference]: Without dead ends: 274 [2022-02-15 13:41:14,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:14,716 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:14,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-15 13:41:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 124. [2022-02-15 13:41:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2022-02-15 13:41:14,738 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2022-02-15 13:41:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2022-02-15 13:41:14,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2022-02-15 13:41:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:41:14,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:14,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:14,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 13:41:14,970 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 13:41:14,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1663020490, now seen corresponding path program 1 times [2022-02-15 13:41:14,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:14,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075537566] [2022-02-15 13:41:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:14,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:15,004 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 13:41:15,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:15,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075537566] [2022-02-15 13:41:15,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075537566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:41:15,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:41:15,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:41:15,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319824916] [2022-02-15 13:41:15,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:41:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:41:15,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:41:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:41:15,006 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:15,068 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2022-02-15 13:41:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:41:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:41:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:15,069 INFO L225 Difference]: With dead ends: 159 [2022-02-15 13:41:15,069 INFO L226 Difference]: Without dead ends: 149 [2022-02-15 13:41:15,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:15,070 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:15,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-15 13:41:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2022-02-15 13:41:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2022-02-15 13:41:15,075 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2022-02-15 13:41:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2022-02-15 13:41:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2022-02-15 13:41:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:41:15,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:15,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:41:15,077 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 585178474, now seen corresponding path program 2 times [2022-02-15 13:41:15,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:15,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458931434] [2022-02-15 13:41:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:15,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:15,114 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 13:41:15,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:15,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458931434] [2022-02-15 13:41:15,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458931434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:15,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686576250] [2022-02-15 13:41:15,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:15,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:15,116 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 13:41:15,117 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 13:41:15,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 13:41:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:15,173 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 13:41:15,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:15,203 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 13:41:15,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686576250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:15,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:15,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-15 13:41:15,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538898246] [2022-02-15 13:41:15,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:15,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:15,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:15,205 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:15,270 INFO L93 Difference]: Finished difference Result 205 states and 453 transitions. [2022-02-15 13:41:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:41:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:41:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:15,271 INFO L225 Difference]: With dead ends: 205 [2022-02-15 13:41:15,271 INFO L226 Difference]: Without dead ends: 205 [2022-02-15 13:41:15,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:15,272 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-15 13:41:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 125. [2022-02-15 13:41:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2022-02-15 13:41:15,277 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2022-02-15 13:41:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:15,277 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2022-02-15 13:41:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2022-02-15 13:41:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:15,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:15,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:15,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:41:15,497 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,SelfDestructingSolverStorable3 [2022-02-15 13:41:15,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1679753339, now seen corresponding path program 1 times [2022-02-15 13:41:15,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:15,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834095537] [2022-02-15 13:41:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:15,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:15,717 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 13:41:15,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:15,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834095537] [2022-02-15 13:41:15,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834095537] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:15,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403342000] [2022-02-15 13:41:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:15,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:15,738 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 13:41:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:15,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:15,766 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 13:41:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:15,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-15 13:41:16,029 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 13:41:16,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:16,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:16,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:16,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:16,167 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 13:41:16,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403342000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:16,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:16,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-02-15 13:41:16,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073512379] [2022-02-15 13:41:16,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:41:16,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:41:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:41:16,169 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:16,421 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2022-02-15 13:41:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:41:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:16,423 INFO L225 Difference]: With dead ends: 441 [2022-02-15 13:41:16,423 INFO L226 Difference]: Without dead ends: 431 [2022-02-15 13:41:16,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:41:16,424 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:16,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 135 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:41:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-15 13:41:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2022-02-15 13:41:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2022-02-15 13:41:16,430 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2022-02-15 13:41:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2022-02-15 13:41:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2022-02-15 13:41:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:16,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:16,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:16,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-15 13:41:16,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:16,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1612347543, now seen corresponding path program 2 times [2022-02-15 13:41:16,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:16,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959851353] [2022-02-15 13:41:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:16,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:16,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:16,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959851353] [2022-02-15 13:41:16,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959851353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:16,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830457792] [2022-02-15 13:41:16,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:16,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:16,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:16,828 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 13:41:16,847 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 13:41:16,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:16,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:17,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:41:17,075 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 13:41:17,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:17,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:17,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:17,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:17,209 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 13:41:17,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830457792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:17,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:17,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-15 13:41:17,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982471693] [2022-02-15 13:41:17,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:41:17,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:41:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:41:17,210 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:17,414 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2022-02-15 13:41:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:41:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:17,416 INFO L225 Difference]: With dead ends: 432 [2022-02-15 13:41:17,417 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 13:41:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:41:17,417 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 125 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:17,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 118 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:41:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 13:41:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2022-02-15 13:41:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2022-02-15 13:41:17,423 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2022-02-15 13:41:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2022-02-15 13:41:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2022-02-15 13:41:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:17,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:17,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:17,440 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 13:41:17,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:17,639 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 144053507, now seen corresponding path program 3 times [2022-02-15 13:41:17,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:17,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551949147] [2022-02-15 13:41:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:17,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:17,754 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 13:41:17,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:17,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551949147] [2022-02-15 13:41:17,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551949147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:17,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290841735] [2022-02-15 13:41:17,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:41:17,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:17,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:17,756 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 13:41:17,780 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 13:41:17,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:41:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:17,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:41:18,036 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 13:41:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:18,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:18,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:18,178 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 13:41:18,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290841735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:18,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:18,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-15 13:41:18,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538809164] [2022-02-15 13:41:18,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:18,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:41:18,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:41:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:41:18,186 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:18,373 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2022-02-15 13:41:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:18,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:41:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:18,374 INFO L225 Difference]: With dead ends: 440 [2022-02-15 13:41:18,375 INFO L226 Difference]: Without dead ends: 429 [2022-02-15 13:41:18,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:41:18,375 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:18,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 118 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-15 13:41:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2022-02-15 13:41:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2022-02-15 13:41:18,381 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2022-02-15 13:41:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2022-02-15 13:41:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2022-02-15 13:41:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:18,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:18,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:18,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-15 13:41:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:18,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2006109563, now seen corresponding path program 4 times [2022-02-15 13:41:18,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:18,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522888339] [2022-02-15 13:41:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:18,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:18,711 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 13:41:18,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:18,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522888339] [2022-02-15 13:41:18,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522888339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:18,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297526217] [2022-02-15 13:41:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:41:18,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:18,712 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 13:41:18,713 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 13:41:18,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:41:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:18,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-15 13:41:18,953 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 13:41:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:19,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:19,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:19,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:19,063 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 13:41:19,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297526217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:19,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:19,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-15 13:41:19,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949321541] [2022-02-15 13:41:19,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:19,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:41:19,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:41:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:41:19,065 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:19,232 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2022-02-15 13:41:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:41:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:19,234 INFO L225 Difference]: With dead ends: 471 [2022-02-15 13:41:19,234 INFO L226 Difference]: Without dead ends: 462 [2022-02-15 13:41:19,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:41:19,235 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:19,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 99 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-02-15 13:41:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2022-02-15 13:41:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2022-02-15 13:41:19,241 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2022-02-15 13:41:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:19,241 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2022-02-15 13:41:19,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2022-02-15 13:41:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:19,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:19,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:19,273 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 13:41:19,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:19,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1668370597, now seen corresponding path program 5 times [2022-02-15 13:41:19,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:19,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317239355] [2022-02-15 13:41:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:19,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:19,608 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 13:41:19,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:19,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317239355] [2022-02-15 13:41:19,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317239355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:19,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311428479] [2022-02-15 13:41:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:41:19,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:19,610 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 13:41:19,611 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 13:41:19,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:41:19,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:19,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-15 13:41:19,844 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 13:41:19,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:19,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:19,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:19,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:19,975 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 13:41:19,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311428479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:19,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:19,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-15 13:41:19,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870416088] [2022-02-15 13:41:19,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:19,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:41:19,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:41:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:41:19,976 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:20,156 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2022-02-15 13:41:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:20,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:41:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:20,158 INFO L225 Difference]: With dead ends: 472 [2022-02-15 13:41:20,158 INFO L226 Difference]: Without dead ends: 463 [2022-02-15 13:41:20,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:41:20,159 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:20,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 119 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-15 13:41:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2022-02-15 13:41:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2022-02-15 13:41:20,165 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2022-02-15 13:41:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:20,165 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2022-02-15 13:41:20,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2022-02-15 13:41:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:41:20,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:20,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:20,197 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 13:41:20,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:20,383 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1961393531, now seen corresponding path program 6 times [2022-02-15 13:41:20,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:20,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823297747] [2022-02-15 13:41:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:20,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:20,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:20,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823297747] [2022-02-15 13:41:20,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823297747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:20,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811296524] [2022-02-15 13:41:20,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:41:20,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:20,490 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 13:41:20,491 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 13:41:20,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:41:20,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:41:20,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:20,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:41:20,725 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 13:41:20,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:20,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:20,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:41:20,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:41:20,858 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 13:41:20,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811296524] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:20,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:20,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-15 13:41:20,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749594630] [2022-02-15 13:41:20,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:20,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:41:20,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:20,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:41:20,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:41:20,860 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 13:41:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:21,095 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2022-02-15 13:41:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 21 [2022-02-15 13:41:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:21,097 INFO L225 Difference]: With dead ends: 469 [2022-02-15 13:41:21,097 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 13:41:21,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:41:21,098 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:21,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 112 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:41:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 13:41:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2022-02-15 13:41:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2022-02-15 13:41:21,103 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2022-02-15 13:41:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:21,104 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2022-02-15 13:41:21,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 13:41:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2022-02-15 13:41:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:21,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:21,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:21,122 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 13:41:21,320 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,SelfDestructingSolverStorable9 [2022-02-15 13:41:21,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 199031744, now seen corresponding path program 7 times [2022-02-15 13:41:21,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:21,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108266306] [2022-02-15 13:41:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:21,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:21,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108266306] [2022-02-15 13:41:21,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108266306] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:21,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741994916] [2022-02-15 13:41:21,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:41:21,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:21,358 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 13:41:21,359 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 13:41:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741994916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:21,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:21,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:41:21,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679155430] [2022-02-15 13:41:21,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:21,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:41:21,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:41:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:21,457 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:21,573 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2022-02-15 13:41:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:21,575 INFO L225 Difference]: With dead ends: 475 [2022-02-15 13:41:21,576 INFO L226 Difference]: Without dead ends: 475 [2022-02-15 13:41:21,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:41:21,576 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:21,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 107 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-15 13:41:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2022-02-15 13:41:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2022-02-15 13:41:21,583 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2022-02-15 13:41:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2022-02-15 13:41:21,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2022-02-15 13:41:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:21,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:21,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:21,602 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 13:41:21,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:21,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1171876950, now seen corresponding path program 8 times [2022-02-15 13:41:21,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:21,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681410204] [2022-02-15 13:41:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:21,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:21,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681410204] [2022-02-15 13:41:21,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681410204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:21,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994855238] [2022-02-15 13:41:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:21,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:21,834 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 13:41:21,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:21,858 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 13:41:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:21,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994855238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:21,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:21,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:41:21,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173060634] [2022-02-15 13:41:21,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:21,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:41:21,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:41:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:21,942 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:22,071 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2022-02-15 13:41:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:22,073 INFO L225 Difference]: With dead ends: 596 [2022-02-15 13:41:22,073 INFO L226 Difference]: Without dead ends: 565 [2022-02-15 13:41:22,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:41:22,074 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:22,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 52 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-15 13:41:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2022-02-15 13:41:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2022-02-15 13:41:22,082 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2022-02-15 13:41:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:22,082 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2022-02-15 13:41:22,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2022-02-15 13:41:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:22,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:22,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:22,099 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 13:41:22,299 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,SelfDestructingSolverStorable11 [2022-02-15 13:41:22,299 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1565100002, now seen corresponding path program 9 times [2022-02-15 13:41:22,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:22,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270255057] [2022-02-15 13:41:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:22,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:22,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270255057] [2022-02-15 13:41:22,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270255057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:22,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622861231] [2022-02-15 13:41:22,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:41:22,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:22,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:22,356 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 13:41:22,357 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 13:41:22,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:41:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622861231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:22,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:22,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:22,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827231680] [2022-02-15 13:41:22,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:22,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:22,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:22,459 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:22,542 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2022-02-15 13:41:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:22,544 INFO L225 Difference]: With dead ends: 552 [2022-02-15 13:41:22,544 INFO L226 Difference]: Without dead ends: 552 [2022-02-15 13:41:22,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:41:22,545 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:22,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 58 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-15 13:41:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2022-02-15 13:41:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2022-02-15 13:41:22,553 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2022-02-15 13:41:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2022-02-15 13:41:22,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2022-02-15 13:41:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:22,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:22,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:22,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-15 13:41:22,754 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,SelfDestructingSolverStorable12 [2022-02-15 13:41:22,755 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2066967746, now seen corresponding path program 10 times [2022-02-15 13:41:22,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:22,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142327150] [2022-02-15 13:41:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:22,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:22,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142327150] [2022-02-15 13:41:22,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142327150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:22,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990193568] [2022-02-15 13:41:22,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:41:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:22,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:22,782 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 13:41:22,811 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 13:41:22,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:41:22,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:22,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990193568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:22,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:22,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:22,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111640227] [2022-02-15 13:41:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:22,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:22,912 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:22,997 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2022-02-15 13:41:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:41:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:22,999 INFO L225 Difference]: With dead ends: 568 [2022-02-15 13:41:22,999 INFO L226 Difference]: Without dead ends: 565 [2022-02-15 13:41:23,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:41:23,000 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:23,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 59 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-15 13:41:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2022-02-15 13:41:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2022-02-15 13:41:23,008 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2022-02-15 13:41:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2022-02-15 13:41:23,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2022-02-15 13:41:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:23,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:23,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:23,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 13:41:23,224 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,SelfDestructingSolverStorable13 [2022-02-15 13:41:23,225 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 459469306, now seen corresponding path program 11 times [2022-02-15 13:41:23,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:23,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758960600] [2022-02-15 13:41:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:23,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:23,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758960600] [2022-02-15 13:41:23,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758960600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:23,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95106032] [2022-02-15 13:41:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:41:23,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:23,250 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 13:41:23,251 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 13:41:23,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:41:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95106032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:23,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:23,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:23,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422406998] [2022-02-15 13:41:23,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:23,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:23,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:23,343 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:23,420 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2022-02-15 13:41:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:23,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:23,430 INFO L225 Difference]: With dead ends: 699 [2022-02-15 13:41:23,430 INFO L226 Difference]: Without dead ends: 699 [2022-02-15 13:41:23,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:41:23,434 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:23,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 80 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-15 13:41:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2022-02-15 13:41:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2022-02-15 13:41:23,465 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2022-02-15 13:41:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:23,466 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2022-02-15 13:41:23,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2022-02-15 13:41:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:23,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:23,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:23,484 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 13:41:23,675 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,SelfDestructingSolverStorable14 [2022-02-15 13:41:23,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash 961337050, now seen corresponding path program 12 times [2022-02-15 13:41:23,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:23,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031338213] [2022-02-15 13:41:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:23,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:23,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031338213] [2022-02-15 13:41:23,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031338213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:23,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233982401] [2022-02-15 13:41:23,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:41:23,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:23,705 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 13:41:23,709 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 13:41:23,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:41:23,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:23,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:23,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:23,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233982401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:23,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:23,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:23,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735207410] [2022-02-15 13:41:23,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:23,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:23,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:23,801 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:23,886 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2022-02-15 13:41:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:41:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:23,889 INFO L225 Difference]: With dead ends: 875 [2022-02-15 13:41:23,889 INFO L226 Difference]: Without dead ends: 872 [2022-02-15 13:41:23,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:41:23,890 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:23,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 46 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-02-15 13:41:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2022-02-15 13:41:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2022-02-15 13:41:23,901 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2022-02-15 13:41:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:23,901 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2022-02-15 13:41:23,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2022-02-15 13:41:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:23,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:23,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:23,933 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 13:41:24,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:24,134 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 619914420, now seen corresponding path program 13 times [2022-02-15 13:41:24,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:24,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31567654] [2022-02-15 13:41:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:24,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:24,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31567654] [2022-02-15 13:41:24,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31567654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:24,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252743674] [2022-02-15 13:41:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:41:24,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:24,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:24,168 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 13:41:24,169 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 13:41:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:24,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:24,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252743674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:24,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:24,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:24,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553807079] [2022-02-15 13:41:24,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:24,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:24,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:24,271 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:24,357 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2022-02-15 13:41:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:24,360 INFO L225 Difference]: With dead ends: 880 [2022-02-15 13:41:24,360 INFO L226 Difference]: Without dead ends: 880 [2022-02-15 13:41:24,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:41:24,360 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:24,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 59 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-02-15 13:41:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2022-02-15 13:41:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2022-02-15 13:41:24,371 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2022-02-15 13:41:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:24,371 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2022-02-15 13:41:24,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2022-02-15 13:41:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:24,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:24,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:24,390 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 13:41:24,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-15 13:41:24,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1526572242, now seen corresponding path program 14 times [2022-02-15 13:41:24,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:24,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888586089] [2022-02-15 13:41:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:24,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:24,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:24,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888586089] [2022-02-15 13:41:24,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888586089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:24,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225987692] [2022-02-15 13:41:24,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:24,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:24,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:24,630 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 13:41:24,631 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 13:41:24,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:24,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:41:24,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225987692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:24,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:24,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-15 13:41:24,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44340384] [2022-02-15 13:41:24,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:24,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:41:24,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:41:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:41:24,727 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:24,830 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2022-02-15 13:41:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:41:24,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:24,833 INFO L225 Difference]: With dead ends: 810 [2022-02-15 13:41:24,833 INFO L226 Difference]: Without dead ends: 806 [2022-02-15 13:41:24,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:41:24,834 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:24,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 52 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-15 13:41:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2022-02-15 13:41:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2022-02-15 13:41:24,844 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2022-02-15 13:41:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:24,844 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2022-02-15 13:41:24,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2022-02-15 13:41:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:24,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:24,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:24,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-15 13:41:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-15 13:41:25,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 190722878, now seen corresponding path program 15 times [2022-02-15 13:41:25,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:25,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643172706] [2022-02-15 13:41:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:25,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:25,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643172706] [2022-02-15 13:41:25,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643172706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:25,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134063033] [2022-02-15 13:41:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:41:25,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:25,101 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 13:41:25,102 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 13:41:25,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:41:25,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:25,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134063033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:25,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:25,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:41:25,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090769919] [2022-02-15 13:41:25,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:41:25,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:41:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:25,209 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:25,310 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2022-02-15 13:41:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:25,313 INFO L225 Difference]: With dead ends: 795 [2022-02-15 13:41:25,313 INFO L226 Difference]: Without dead ends: 795 [2022-02-15 13:41:25,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:41:25,313 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:25,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 75 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-15 13:41:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2022-02-15 13:41:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2022-02-15 13:41:25,322 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2022-02-15 13:41:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:25,323 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2022-02-15 13:41:25,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2022-02-15 13:41:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:41:25,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:25,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:25,357 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 13:41:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:25,539 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1589266240, now seen corresponding path program 16 times [2022-02-15 13:41:25,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:25,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078661480] [2022-02-15 13:41:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:25,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078661480] [2022-02-15 13:41:25,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078661480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:25,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149421571] [2022-02-15 13:41:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:41:25,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:25,589 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 13:41:25,589 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 13:41:25,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:41:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:41:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:25,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149421571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:25,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:25,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-15 13:41:25,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850136852] [2022-02-15 13:41:25,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:25,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:41:25,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:41:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:41:25,686 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:25,794 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2022-02-15 13:41:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:41:25,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:41:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:25,796 INFO L225 Difference]: With dead ends: 856 [2022-02-15 13:41:25,796 INFO L226 Difference]: Without dead ends: 835 [2022-02-15 13:41:25,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:41:25,797 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:25,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 50 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:41:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-15 13:41:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2022-02-15 13:41:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2022-02-15 13:41:25,806 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2022-02-15 13:41:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2022-02-15 13:41:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2022-02-15 13:41:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:25,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:25,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:25,832 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 13:41:26,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:26,032 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1761346971, now seen corresponding path program 17 times [2022-02-15 13:41:26,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:26,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602897517] [2022-02-15 13:41:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:26,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:26,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:26,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602897517] [2022-02-15 13:41:26,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602897517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:26,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703369233] [2022-02-15 13:41:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:41:26,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:26,346 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 13:41:26,364 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 13:41:26,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:41:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:26,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:41:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:26,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:26,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:26,974 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:27,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:27,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:27,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:27,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703369233] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:27,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:27,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:41:27,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056189292] [2022-02-15 13:41:27,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:27,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:41:27,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:41:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:41:27,124 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:41:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:28,531 INFO L93 Difference]: Finished difference Result 2072 states and 5024 transitions. [2022-02-15 13:41:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:41:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:41:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:28,538 INFO L225 Difference]: With dead ends: 2072 [2022-02-15 13:41:28,538 INFO L226 Difference]: Without dead ends: 2062 [2022-02-15 13:41:28,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:41:28,539 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 384 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:28,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 252 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:41:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-02-15 13:41:28,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 773. [2022-02-15 13:41:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2022-02-15 13:41:28,555 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2022-02-15 13:41:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:28,555 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2022-02-15 13:41:28,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:41:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2022-02-15 13:41:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:28,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:28,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:28,578 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 13:41:28,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:28,771 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1956939167, now seen corresponding path program 18 times [2022-02-15 13:41:28,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:28,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607787621] [2022-02-15 13:41:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:28,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:29,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:29,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607787621] [2022-02-15 13:41:29,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607787621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:29,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772943303] [2022-02-15 13:41:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:41:29,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:29,089 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 13:41:29,090 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 13:41:29,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:41:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:29,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:41:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:29,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:29,672 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:29,673 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:41:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:29,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:41:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:29,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772943303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:29,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:29,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-15 13:41:29,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325038081] [2022-02-15 13:41:29,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:29,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:41:29,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:41:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:41:29,776 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:30,877 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2022-02-15 13:41:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:41:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 29 [2022-02-15 13:41:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:30,884 INFO L225 Difference]: With dead ends: 2173 [2022-02-15 13:41:30,884 INFO L226 Difference]: Without dead ends: 2162 [2022-02-15 13:41:30,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:41:30,885 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 203 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:41:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2022-02-15 13:41:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2022-02-15 13:41:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2022-02-15 13:41:30,901 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2022-02-15 13:41:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:30,901 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2022-02-15 13:41:30,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2022-02-15 13:41:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:30,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:30,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:30,918 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 13:41:31,118 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,SelfDestructingSolverStorable21 [2022-02-15 13:41:31,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -581627079, now seen corresponding path program 19 times [2022-02-15 13:41:31,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:31,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888776660] [2022-02-15 13:41:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:31,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:31,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:31,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888776660] [2022-02-15 13:41:31,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888776660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:31,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827843099] [2022-02-15 13:41:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:41:31,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:31,436 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 13:41:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:31,481 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 13:41:31,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:41:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:31,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:32,043 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:32,044 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:32,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:32,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:32,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827843099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:32,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:32,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-15 13:41:32,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728535144] [2022-02-15 13:41:32,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:32,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:41:32,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:41:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:41:32,156 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:33,267 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2022-02-15 13:41:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:41:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:41:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:33,274 INFO L225 Difference]: With dead ends: 2310 [2022-02-15 13:41:33,274 INFO L226 Difference]: Without dead ends: 2290 [2022-02-15 13:41:33,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:41:33,275 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 280 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:33,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 212 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:41:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-15 13:41:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2022-02-15 13:41:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2022-02-15 13:41:33,294 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2022-02-15 13:41:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2022-02-15 13:41:33,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2022-02-15 13:41:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:33,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:33,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:33,329 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 13:41:33,509 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,SelfDestructingSolverStorable22 [2022-02-15 13:41:33,509 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2142000305, now seen corresponding path program 20 times [2022-02-15 13:41:33,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:33,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226770710] [2022-02-15 13:41:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:33,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:33,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226770710] [2022-02-15 13:41:33,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226770710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874403310] [2022-02-15 13:41:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:33,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:33,745 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 13:41:33,746 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 13:41:33,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:33,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:41:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:34,244 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:34,244 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:34,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:34,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:34,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:34,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874403310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:34,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:34,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:41:34,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357123380] [2022-02-15 13:41:34,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:34,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:41:34,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:41:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:41:34,346 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:41:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:35,549 INFO L93 Difference]: Finished difference Result 2232 states and 5402 transitions. [2022-02-15 13:41:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:41:35,549 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:41:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:35,556 INFO L225 Difference]: With dead ends: 2232 [2022-02-15 13:41:35,556 INFO L226 Difference]: Without dead ends: 2209 [2022-02-15 13:41:35,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 13:41:35,561 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 372 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:35,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 268 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:41:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-02-15 13:41:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 800. [2022-02-15 13:41:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2022-02-15 13:41:35,577 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2022-02-15 13:41:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:35,578 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2022-02-15 13:41:35,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:41:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2022-02-15 13:41:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:35,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:35,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:35,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:41:35,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:35,794 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 828755281, now seen corresponding path program 21 times [2022-02-15 13:41:35,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:35,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226370595] [2022-02-15 13:41:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:35,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:36,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:36,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226370595] [2022-02-15 13:41:36,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226370595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:36,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679584914] [2022-02-15 13:41:36,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:41:36,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:36,093 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 13:41:36,094 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 13:41:36,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:41:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:36,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 13:41:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:36,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:36,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:36,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:41:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:37,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:37,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-15 13:41:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:37,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679584914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:37,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:37,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-02-15 13:41:37,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373210750] [2022-02-15 13:41:37,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:37,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:41:37,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:41:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:41:37,470 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 13:41:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:38,820 INFO L93 Difference]: Finished difference Result 2051 states and 4946 transitions. [2022-02-15 13:41:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:41:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 29 [2022-02-15 13:41:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:38,824 INFO L225 Difference]: With dead ends: 2051 [2022-02-15 13:41:38,824 INFO L226 Difference]: Without dead ends: 2043 [2022-02-15 13:41:38,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:41:38,825 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 463 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:38,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 270 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 959 Invalid, 0 Unknown, 1147 Unchecked, 0.5s Time] [2022-02-15 13:41:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-02-15 13:41:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 868. [2022-02-15 13:41:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.364475201845444) internal successors, (2050), 867 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2050 transitions. [2022-02-15 13:41:38,840 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2050 transitions. Word has length 29 [2022-02-15 13:41:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:38,840 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2050 transitions. [2022-02-15 13:41:38,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 13:41:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2050 transitions. [2022-02-15 13:41:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:38,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:38,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:38,873 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 13:41:39,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:39,055 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash -882143023, now seen corresponding path program 22 times [2022-02-15 13:41:39,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:39,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900617404] [2022-02-15 13:41:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:39,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:39,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:39,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900617404] [2022-02-15 13:41:39,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900617404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:39,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953534939] [2022-02-15 13:41:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:41:39,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:39,375 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 13:41:39,376 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 13:41:39,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:41:39,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:39,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:41:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:40,017 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:40,017 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:40,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:40,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:40,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:40,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953534939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:40,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:40,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:41:40,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064528513] [2022-02-15 13:41:40,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:40,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:41:40,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:41:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:41:40,122 INFO L87 Difference]: Start difference. First operand 868 states and 2050 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:41:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:41,330 INFO L93 Difference]: Finished difference Result 2139 states and 5175 transitions. [2022-02-15 13:41:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:41:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 29 [2022-02-15 13:41:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:41,335 INFO L225 Difference]: With dead ends: 2139 [2022-02-15 13:41:41,335 INFO L226 Difference]: Without dead ends: 2127 [2022-02-15 13:41:41,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:41:41,336 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 339 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:41,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 235 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:41:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-02-15 13:41:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 800. [2022-02-15 13:41:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2022-02-15 13:41:41,350 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2022-02-15 13:41:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:41,350 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2022-02-15 13:41:41,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:41:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2022-02-15 13:41:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:41,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:41,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:41,369 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 13:41:41,564 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,SelfDestructingSolverStorable25 [2022-02-15 13:41:41,564 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1822474267, now seen corresponding path program 23 times [2022-02-15 13:41:41,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:41,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673562837] [2022-02-15 13:41:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:41,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:41,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:41,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673562837] [2022-02-15 13:41:41,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673562837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:41,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335336710] [2022-02-15 13:41:41,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:41:41,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:41,881 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 13:41:41,881 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 13:41:41,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:41:41,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:41,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:42,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:41:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:42,534 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:42,535 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:41:42,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:42,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:42,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:41:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:42,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335336710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:42,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:42,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-02-15 13:41:42,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165166854] [2022-02-15 13:41:42,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:41:42,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:41:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:41:42,639 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:44,454 INFO L93 Difference]: Finished difference Result 2311 states and 5676 transitions. [2022-02-15 13:41:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:41:44,455 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 29 [2022-02-15 13:41:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:44,459 INFO L225 Difference]: With dead ends: 2311 [2022-02-15 13:41:44,459 INFO L226 Difference]: Without dead ends: 2300 [2022-02-15 13:41:44,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:41:44,460 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:44,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 220 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:41:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-02-15 13:41:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 852. [2022-02-15 13:41:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.383078730904818) internal successors, (2028), 851 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2028 transitions. [2022-02-15 13:41:44,476 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2028 transitions. Word has length 29 [2022-02-15 13:41:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2028 transitions. [2022-02-15 13:41:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2028 transitions. [2022-02-15 13:41:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:44,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:44,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:44,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:41:44,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-15 13:41:44,693 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1852005893, now seen corresponding path program 24 times [2022-02-15 13:41:44,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:44,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330237381] [2022-02-15 13:41:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:44,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:44,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:44,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330237381] [2022-02-15 13:41:44,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330237381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:44,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281350475] [2022-02-15 13:41:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:41:44,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:44,994 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 13:41:44,995 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 13:41:45,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:41:45,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:45,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:41:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:45,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:45,619 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:45,620 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:41:45,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:45,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:45,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:41:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:45,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281350475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:45,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:45,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-02-15 13:41:45,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132686562] [2022-02-15 13:41:45,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:45,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:41:45,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:41:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:41:45,723 INFO L87 Difference]: Start difference. First operand 852 states and 2028 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:47,510 INFO L93 Difference]: Finished difference Result 2417 states and 5971 transitions. [2022-02-15 13:41:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:41:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:41:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:47,514 INFO L225 Difference]: With dead ends: 2417 [2022-02-15 13:41:47,514 INFO L226 Difference]: Without dead ends: 2402 [2022-02-15 13:41:47,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:41:47,515 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 175 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:41:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-02-15 13:41:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 864. [2022-02-15 13:41:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.384704519119351) internal successors, (2058), 863 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2058 transitions. [2022-02-15 13:41:47,532 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2058 transitions. Word has length 29 [2022-02-15 13:41:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:47,532 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2058 transitions. [2022-02-15 13:41:47,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2058 transitions. [2022-02-15 13:41:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:47,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:47,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:47,551 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 13:41:47,748 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,SelfDestructingSolverStorable27 [2022-02-15 13:41:47,749 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1777758235, now seen corresponding path program 25 times [2022-02-15 13:41:47,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:47,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295502510] [2022-02-15 13:41:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:47,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:48,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:48,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295502510] [2022-02-15 13:41:48,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295502510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:48,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253551643] [2022-02-15 13:41:48,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:41:48,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:48,047 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 13:41:48,049 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 13:41:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:48,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:48,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:41:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:48,663 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:48,664 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:48,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:48,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253551643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:48,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:48,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-02-15 13:41:48,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938872959] [2022-02-15 13:41:48,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:48,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:41:48,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:41:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:41:48,759 INFO L87 Difference]: Start difference. First operand 864 states and 2058 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 13:41:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:50,251 INFO L93 Difference]: Finished difference Result 2652 states and 6552 transitions. [2022-02-15 13:41:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:41:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 29 [2022-02-15 13:41:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:50,256 INFO L225 Difference]: With dead ends: 2652 [2022-02-15 13:41:50,256 INFO L226 Difference]: Without dead ends: 2619 [2022-02-15 13:41:50,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=3260, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:41:50,261 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 345 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:50,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 206 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:41:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-15 13:41:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 851. [2022-02-15 13:41:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.3835294117647057) internal successors, (2026), 850 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2026 transitions. [2022-02-15 13:41:50,278 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2026 transitions. Word has length 29 [2022-02-15 13:41:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:50,278 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2026 transitions. [2022-02-15 13:41:50,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 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 13:41:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2026 transitions. [2022-02-15 13:41:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:50,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:50,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:50,304 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 13:41:50,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 13:41:50,495 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 709848259, now seen corresponding path program 26 times [2022-02-15 13:41:50,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:50,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110117347] [2022-02-15 13:41:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:50,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:50,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:50,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110117347] [2022-02-15 13:41:50,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110117347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:50,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139397976] [2022-02-15 13:41:50,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:41:50,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:50,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:50,726 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 13:41:50,727 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 13:41:50,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:41:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:50,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:41:50,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:50,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:41:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:50,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:51,131 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:51,131 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:41:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:51,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:41:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:51,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139397976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:51,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:51,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-15 13:41:51,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389665007] [2022-02-15 13:41:51,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:41:51,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:41:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:41:51,202 INFO L87 Difference]: Start difference. First operand 851 states and 2026 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:52,531 INFO L93 Difference]: Finished difference Result 2315 states and 5704 transitions. [2022-02-15 13:41:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:41:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 29 [2022-02-15 13:41:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:52,536 INFO L225 Difference]: With dead ends: 2315 [2022-02-15 13:41:52,536 INFO L226 Difference]: Without dead ends: 2304 [2022-02-15 13:41:52,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=2528, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:41:52,538 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 353 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:52,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 177 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:41:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-02-15 13:41:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 872. [2022-02-15 13:41:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.388059701492537) internal successors, (2080), 871 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2080 transitions. [2022-02-15 13:41:52,553 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2080 transitions. Word has length 29 [2022-02-15 13:41:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:52,553 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2080 transitions. [2022-02-15 13:41:52,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:41:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2080 transitions. [2022-02-15 13:41:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:52,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:52,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:52,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:41:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:52,759 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1828717987, now seen corresponding path program 27 times [2022-02-15 13:41:52,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:52,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39219864] [2022-02-15 13:41:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:52,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:53,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:53,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39219864] [2022-02-15 13:41:53,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39219864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:53,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357341753] [2022-02-15 13:41:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:41:53,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:53,020 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 13:41:53,021 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 13:41:53,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:41:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:53,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 13:41:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:53,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:53,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 44 [2022-02-15 13:41:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:53,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:53,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:41:53,969 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2022-02-15 13:41:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:54,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357341753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:54,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:54,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 35 [2022-02-15 13:41:54,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884877241] [2022-02-15 13:41:54,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:54,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:41:54,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:41:54,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:41:54,032 INFO L87 Difference]: Start difference. First operand 872 states and 2080 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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 13:41:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:41:58,635 INFO L93 Difference]: Finished difference Result 3328 states and 8265 transitions. [2022-02-15 13:41:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 13:41:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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 29 [2022-02-15 13:41:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:41:58,641 INFO L225 Difference]: With dead ends: 3328 [2022-02-15 13:41:58,641 INFO L226 Difference]: Without dead ends: 3310 [2022-02-15 13:41:58,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2064, Invalid=10146, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:41:58,644 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 445 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:41:58,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 208 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2055 Invalid, 0 Unknown, 953 Unchecked, 1.0s Time] [2022-02-15 13:41:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2022-02-15 13:41:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 941. [2022-02-15 13:41:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.4063829787234043) internal successors, (2262), 940 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:41:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2262 transitions. [2022-02-15 13:41:58,671 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2262 transitions. Word has length 29 [2022-02-15 13:41:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:41:58,671 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2262 transitions. [2022-02-15 13:41:58,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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 13:41:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2262 transitions. [2022-02-15 13:41:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:41:58,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:41:58,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:41:58,705 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 13:41:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:58,890 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:41:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:41:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1548299119, now seen corresponding path program 28 times [2022-02-15 13:41:58,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:41:58,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11653039] [2022-02-15 13:41:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:41:58,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:41:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:41:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:59,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:41:59,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11653039] [2022-02-15 13:41:59,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11653039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:41:59,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052479025] [2022-02-15 13:41:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:41:59,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:41:59,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:41:59,182 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 13:41:59,183 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 13:41:59,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:41:59,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:41:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:41:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:41:59,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:41:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:59,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:41:59,790 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:41:59,790 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:41:59,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:59,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:41:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:41:59,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:41:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:41:59,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052479025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:41:59,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:41:59,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:41:59,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332578284] [2022-02-15 13:41:59,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:41:59,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:41:59,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:41:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:41:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:41:59,895 INFO L87 Difference]: Start difference. First operand 941 states and 2262 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:02,268 INFO L93 Difference]: Finished difference Result 2951 states and 7228 transitions. [2022-02-15 13:42:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:42:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:42:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:02,272 INFO L225 Difference]: With dead ends: 2951 [2022-02-15 13:42:02,272 INFO L226 Difference]: Without dead ends: 2896 [2022-02-15 13:42:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1003, Invalid=5159, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:42:02,275 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 565 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:02,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 165 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:42:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2022-02-15 13:42:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 858. [2022-02-15 13:42:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.382730455075846) internal successors, (2042), 857 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2042 transitions. [2022-02-15 13:42:02,308 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2042 transitions. Word has length 29 [2022-02-15 13:42:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:02,308 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2042 transitions. [2022-02-15 13:42:02,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2042 transitions. [2022-02-15 13:42:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:02,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:02,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:02,326 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 13:42:02,509 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,SelfDestructingSolverStorable31 [2022-02-15 13:42:02,510 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash -299763919, now seen corresponding path program 29 times [2022-02-15 13:42:02,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:02,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375427678] [2022-02-15 13:42:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:02,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:02,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:02,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375427678] [2022-02-15 13:42:02,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375427678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:02,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632550898] [2022-02-15 13:42:02,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:42:02,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:02,812 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 13:42:02,818 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 13:42:02,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:42:02,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:02,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:03,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:42:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:03,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:03,257 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:03,258 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:03,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:03,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:03,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:03,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632550898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:03,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:03,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:42:03,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091800615] [2022-02-15 13:42:03,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:03,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:42:03,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:42:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:42:03,352 INFO L87 Difference]: Start difference. First operand 858 states and 2042 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:05,195 INFO L93 Difference]: Finished difference Result 2305 states and 5582 transitions. [2022-02-15 13:42:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:42:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:42:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:05,199 INFO L225 Difference]: With dead ends: 2305 [2022-02-15 13:42:05,199 INFO L226 Difference]: Without dead ends: 2263 [2022-02-15 13:42:05,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=576, Invalid=3330, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:42:05,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 510 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:05,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 195 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-02-15 13:42:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 849. [2022-02-15 13:42:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.3797169811320753) internal successors, (2018), 848 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2018 transitions. [2022-02-15 13:42:05,240 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2018 transitions. Word has length 29 [2022-02-15 13:42:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:05,240 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2018 transitions. [2022-02-15 13:42:05,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2018 transitions. [2022-02-15 13:42:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:05,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:05,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:05,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-15 13:42:05,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:05,442 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash -724305229, now seen corresponding path program 30 times [2022-02-15 13:42:05,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:05,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561826185] [2022-02-15 13:42:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:05,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:05,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:05,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561826185] [2022-02-15 13:42:05,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561826185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:05,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132002144] [2022-02-15 13:42:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:42:05,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:05,763 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 13:42:05,764 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 13:42:05,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:42:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:05,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:42:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:06,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:06,149 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 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-15 13:42:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:07,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:07,296 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:42:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:07,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132002144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:07,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:07,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-15 13:42:07,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84522335] [2022-02-15 13:42:07,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:07,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:42:07,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:42:07,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:42:07,358 INFO L87 Difference]: Start difference. First operand 849 states and 2018 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:08,974 INFO L93 Difference]: Finished difference Result 1533 states and 3690 transitions. [2022-02-15 13:42:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:42:08,975 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:42:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:08,977 INFO L225 Difference]: With dead ends: 1533 [2022-02-15 13:42:08,977 INFO L226 Difference]: Without dead ends: 1522 [2022-02-15 13:42:08,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=570, Invalid=2736, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:42:08,978 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 335 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:08,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 144 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 766 Invalid, 0 Unknown, 1393 Unchecked, 0.4s Time] [2022-02-15 13:42:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-15 13:42:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 887. [2022-02-15 13:42:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.3905191873589167) internal successors, (2118), 886 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2118 transitions. [2022-02-15 13:42:08,998 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2118 transitions. Word has length 29 [2022-02-15 13:42:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:08,998 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2118 transitions. [2022-02-15 13:42:08,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2118 transitions. [2022-02-15 13:42:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:08,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:08,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:09,018 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 13:42:09,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:09,216 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1032095821, now seen corresponding path program 31 times [2022-02-15 13:42:09,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:09,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510382571] [2022-02-15 13:42:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:09,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:09,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:09,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510382571] [2022-02-15 13:42:09,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510382571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:09,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495045696] [2022-02-15 13:42:09,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:42:09,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:09,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:09,511 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 13:42:09,512 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 13:42:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:09,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:42:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:09,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:10,139 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:10,139 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:10,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:10,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:10,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495045696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:10,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:10,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-15 13:42:10,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405452246] [2022-02-15 13:42:10,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:10,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:42:10,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:42:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:42:10,242 INFO L87 Difference]: Start difference. First operand 887 states and 2118 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:12,032 INFO L93 Difference]: Finished difference Result 2979 states and 7351 transitions. [2022-02-15 13:42:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:42:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:42:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:12,036 INFO L225 Difference]: With dead ends: 2979 [2022-02-15 13:42:12,036 INFO L226 Difference]: Without dead ends: 2950 [2022-02-15 13:42:12,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:42:12,037 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 442 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:12,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 234 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2022-02-15 13:42:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 912. [2022-02-15 13:42:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.3918770581778266) internal successors, (2179), 911 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2179 transitions. [2022-02-15 13:42:12,054 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2179 transitions. Word has length 29 [2022-02-15 13:42:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:12,054 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2179 transitions. [2022-02-15 13:42:12,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2179 transitions. [2022-02-15 13:42:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:12,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:12,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:12,071 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 13:42:12,271 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,SelfDestructingSolverStorable34 [2022-02-15 13:42:12,271 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash -539244091, now seen corresponding path program 32 times [2022-02-15 13:42:12,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:12,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664824552] [2022-02-15 13:42:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:12,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:12,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:12,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664824552] [2022-02-15 13:42:12,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664824552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:12,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920805418] [2022-02-15 13:42:12,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:42:12,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:12,500 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 13:42:12,501 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 13:42:12,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:42:12,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:12,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:42:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:12,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:12,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2022-02-15 13:42:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:13,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:13,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:13,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:42:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:13,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920805418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:13,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:13,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-02-15 13:42:13,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152203786] [2022-02-15 13:42:13,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:13,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:42:13,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:42:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:42:13,659 INFO L87 Difference]: Start difference. First operand 912 states and 2179 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:15,623 INFO L93 Difference]: Finished difference Result 2296 states and 5620 transitions. [2022-02-15 13:42:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:42:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:42:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:15,628 INFO L225 Difference]: With dead ends: 2296 [2022-02-15 13:42:15,628 INFO L226 Difference]: Without dead ends: 2283 [2022-02-15 13:42:15,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=898, Invalid=3932, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:42:15,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 423 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:15,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 231 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1007 Invalid, 0 Unknown, 1483 Unchecked, 0.5s Time] [2022-02-15 13:42:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-15 13:42:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 957. [2022-02-15 13:42:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.403765690376569) internal successors, (2298), 956 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2298 transitions. [2022-02-15 13:42:15,645 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2298 transitions. Word has length 29 [2022-02-15 13:42:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:15,646 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2298 transitions. [2022-02-15 13:42:15,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2298 transitions. [2022-02-15 13:42:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:15,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:15,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:15,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:15,859 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,SelfDestructingSolverStorable35 [2022-02-15 13:42:15,860 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1852489115, now seen corresponding path program 33 times [2022-02-15 13:42:15,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:15,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116871175] [2022-02-15 13:42:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:15,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:16,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:16,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116871175] [2022-02-15 13:42:16,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116871175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:16,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685055206] [2022-02-15 13:42:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:42:16,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:16,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:16,127 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 13:42:16,128 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 13:42:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:42:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:16,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:42:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:16,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:16,564 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:16,564 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:16,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:16,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:16,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:16,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685055206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:16,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:16,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:42:16,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808662889] [2022-02-15 13:42:16,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:42:16,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:42:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:42:16,632 INFO L87 Difference]: Start difference. First operand 957 states and 2298 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:17,779 INFO L93 Difference]: Finished difference Result 2414 states and 5888 transitions. [2022-02-15 13:42:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:42:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:42:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:17,783 INFO L225 Difference]: With dead ends: 2414 [2022-02-15 13:42:17,783 INFO L226 Difference]: Without dead ends: 2401 [2022-02-15 13:42:17,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=2124, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:42:17,783 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 323 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:17,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 295 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:42:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-02-15 13:42:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 959. [2022-02-15 13:42:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.403966597077244) internal successors, (2303), 958 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2303 transitions. [2022-02-15 13:42:17,798 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2303 transitions. Word has length 29 [2022-02-15 13:42:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:17,798 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2303 transitions. [2022-02-15 13:42:17,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2303 transitions. [2022-02-15 13:42:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:17,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:17,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:17,816 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 13:42:18,014 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,SelfDestructingSolverStorable36 [2022-02-15 13:42:18,014 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1357085963, now seen corresponding path program 34 times [2022-02-15 13:42:18,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:18,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87032901] [2022-02-15 13:42:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:18,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:18,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:18,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87032901] [2022-02-15 13:42:18,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87032901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:18,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848946179] [2022-02-15 13:42:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:42:18,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:18,247 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 13:42:18,248 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 13:42:18,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:42:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:18,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:42:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:18,728 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:18,728 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:18,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:18,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848946179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:18,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:18,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-15 13:42:18,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296588156] [2022-02-15 13:42:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:18,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:42:18,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:42:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:42:18,813 INFO L87 Difference]: Start difference. First operand 959 states and 2303 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:20,414 INFO L93 Difference]: Finished difference Result 2934 states and 7080 transitions. [2022-02-15 13:42:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:42:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 29 [2022-02-15 13:42:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:20,418 INFO L225 Difference]: With dead ends: 2934 [2022-02-15 13:42:20,418 INFO L226 Difference]: Without dead ends: 2881 [2022-02-15 13:42:20,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:42:20,419 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 412 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:20,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 358 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2022-02-15 13:42:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 915. [2022-02-15 13:42:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.3916849015317285) internal successors, (2186), 914 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2186 transitions. [2022-02-15 13:42:20,435 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2186 transitions. Word has length 29 [2022-02-15 13:42:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:20,435 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2186 transitions. [2022-02-15 13:42:20,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 13:42:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2186 transitions. [2022-02-15 13:42:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:20,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:20,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:20,452 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 13:42:20,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:20,650 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:20,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash 262678323, now seen corresponding path program 35 times [2022-02-15 13:42:20,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:20,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193620570] [2022-02-15 13:42:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:20,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:20,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:20,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193620570] [2022-02-15 13:42:20,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193620570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:20,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219738724] [2022-02-15 13:42:20,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:42:20,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:20,890 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 13:42:20,909 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 13:42:20,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:42:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:21,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:42:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:21,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:21,374 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:21,375 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:21,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:21,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:21,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:21,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219738724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:21,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:21,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-15 13:42:21,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24476968] [2022-02-15 13:42:21,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:42:21,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:42:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:42:21,442 INFO L87 Difference]: Start difference. First operand 915 states and 2186 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:42:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:22,720 INFO L93 Difference]: Finished difference Result 2654 states and 6554 transitions. [2022-02-15 13:42:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:42:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 29 [2022-02-15 13:42:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:22,724 INFO L225 Difference]: With dead ends: 2654 [2022-02-15 13:42:22,724 INFO L226 Difference]: Without dead ends: 2629 [2022-02-15 13:42:22,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:42:22,725 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 294 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:22,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 268 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:42:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2022-02-15 13:42:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 908. [2022-02-15 13:42:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.3914002205071663) internal successors, (2169), 907 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2169 transitions. [2022-02-15 13:42:22,764 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2169 transitions. Word has length 29 [2022-02-15 13:42:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:22,764 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2169 transitions. [2022-02-15 13:42:22,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 13:42:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2169 transitions. [2022-02-15 13:42:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:22,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:22,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:22,783 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 13:42:22,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 13:42:22,966 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1014151221, now seen corresponding path program 36 times [2022-02-15 13:42:22,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:22,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701926324] [2022-02-15 13:42:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:22,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:23,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701926324] [2022-02-15 13:42:23,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701926324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203851993] [2022-02-15 13:42:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:42:23,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:23,205 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 13:42:23,217 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 13:42:23,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:42:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:23,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:42:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:23,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:23,815 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:23,815 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:23,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:23,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:23,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203851993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:23,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:23,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:23,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48507307] [2022-02-15 13:42:23,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:23,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:23,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:23,900 INFO L87 Difference]: Start difference. First operand 908 states and 2169 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:25,514 INFO L93 Difference]: Finished difference Result 2349 states and 5753 transitions. [2022-02-15 13:42:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:42:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 29 [2022-02-15 13:42:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:25,517 INFO L225 Difference]: With dead ends: 2349 [2022-02-15 13:42:25,517 INFO L226 Difference]: Without dead ends: 2320 [2022-02-15 13:42:25,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=407, Invalid=3253, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:42:25,518 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 356 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:25,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 262 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:42:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2022-02-15 13:42:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 949. [2022-02-15 13:42:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3966244725738397) internal successors, (2272), 948 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2272 transitions. [2022-02-15 13:42:25,534 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2272 transitions. Word has length 29 [2022-02-15 13:42:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:25,534 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 2272 transitions. [2022-02-15 13:42:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2272 transitions. [2022-02-15 13:42:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:25,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:25,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:25,551 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 13:42:25,751 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,SelfDestructingSolverStorable39 [2022-02-15 13:42:25,751 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1287822959, now seen corresponding path program 37 times [2022-02-15 13:42:25,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:25,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564106963] [2022-02-15 13:42:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:25,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:26,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:26,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564106963] [2022-02-15 13:42:26,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564106963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:26,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868296492] [2022-02-15 13:42:26,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:42:26,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:26,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:26,063 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 13:42:26,070 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 13:42:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:26,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:42:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:26,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:26,479 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:26,479 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:26,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:26,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:26,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868296492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:26,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:26,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:26,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035572369] [2022-02-15 13:42:26,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:26,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:26,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:26,549 INFO L87 Difference]: Start difference. First operand 949 states and 2272 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 13:42:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:28,181 INFO L93 Difference]: Finished difference Result 2959 states and 7321 transitions. [2022-02-15 13:42:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:42:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 29 [2022-02-15 13:42:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:28,185 INFO L225 Difference]: With dead ends: 2959 [2022-02-15 13:42:28,185 INFO L226 Difference]: Without dead ends: 2936 [2022-02-15 13:42:28,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=648, Invalid=3908, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:42:28,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:28,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 197 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:42:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-02-15 13:42:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 961. [2022-02-15 13:42:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 2.396875) internal successors, (2301), 960 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 2301 transitions. [2022-02-15 13:42:28,213 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 2301 transitions. Word has length 29 [2022-02-15 13:42:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:28,213 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 2301 transitions. [2022-02-15 13:42:28,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 13:42:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 2301 transitions. [2022-02-15 13:42:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:28,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:28,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:28,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:28,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:28,427 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1953026127, now seen corresponding path program 38 times [2022-02-15 13:42:28,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:28,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676318225] [2022-02-15 13:42:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:28,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:28,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:28,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676318225] [2022-02-15 13:42:28,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676318225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:28,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644172998] [2022-02-15 13:42:28,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:42:28,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:28,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:28,740 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 13:42:28,803 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 13:42:28,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:42:28,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:28,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:29,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:42:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:29,228 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:29,228 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:29,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:29,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:29,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:29,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644172998] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:29,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:29,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:29,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127122990] [2022-02-15 13:42:29,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:29,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:29,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:29,294 INFO L87 Difference]: Start difference. First operand 961 states and 2301 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:42:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:30,846 INFO L93 Difference]: Finished difference Result 2579 states and 6380 transitions. [2022-02-15 13:42:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:42:30,846 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:42:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:30,850 INFO L225 Difference]: With dead ends: 2579 [2022-02-15 13:42:30,850 INFO L226 Difference]: Without dead ends: 2556 [2022-02-15 13:42:30,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=3434, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:42:30,858 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 335 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:30,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 203 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:42:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-15 13:42:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 980. [2022-02-15 13:42:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.4096016343207354) internal successors, (2359), 979 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2359 transitions. [2022-02-15 13:42:30,887 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2359 transitions. Word has length 29 [2022-02-15 13:42:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 2359 transitions. [2022-02-15 13:42:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:42:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2359 transitions. [2022-02-15 13:42:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:30,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:30,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:30,917 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 13:42:31,089 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,SelfDestructingSolverStorable41 [2022-02-15 13:42:31,089 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1441520993, now seen corresponding path program 39 times [2022-02-15 13:42:31,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:31,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626450694] [2022-02-15 13:42:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:31,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:31,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:31,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626450694] [2022-02-15 13:42:31,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626450694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:31,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458339917] [2022-02-15 13:42:31,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:42:31,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:31,386 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 13:42:31,387 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 13:42:31,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:42:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:31,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:42:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:31,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:31,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-15 13:42:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:32,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:32,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-02-15 13:42:32,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:42:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:32,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458339917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:32,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:32,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 34 [2022-02-15 13:42:32,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837865769] [2022-02-15 13:42:32,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:32,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:42:32,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:42:32,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:42:32,426 INFO L87 Difference]: Start difference. First operand 980 states and 2359 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:35,089 INFO L93 Difference]: Finished difference Result 2193 states and 5528 transitions. [2022-02-15 13:42:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:42:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-15 13:42:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:35,097 INFO L225 Difference]: With dead ends: 2193 [2022-02-15 13:42:35,098 INFO L226 Difference]: Without dead ends: 2174 [2022-02-15 13:42:35,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1253, Invalid=6579, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:42:35,099 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 415 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 710 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:35,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 206 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2020 Invalid, 0 Unknown, 710 Unchecked, 0.8s Time] [2022-02-15 13:42:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-02-15 13:42:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1032. [2022-02-15 13:42:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.4219204655674105) internal successors, (2497), 1031 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2497 transitions. [2022-02-15 13:42:35,116 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2497 transitions. Word has length 29 [2022-02-15 13:42:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:35,117 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 2497 transitions. [2022-02-15 13:42:35,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2497 transitions. [2022-02-15 13:42:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:35,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:35,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:35,136 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 13:42:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:35,326 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 314880057, now seen corresponding path program 40 times [2022-02-15 13:42:35,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:35,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268988375] [2022-02-15 13:42:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:35,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:35,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:35,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268988375] [2022-02-15 13:42:35,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268988375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:35,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909625110] [2022-02-15 13:42:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:42:35,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:35,652 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 13:42:35,653 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 13:42:35,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:42:35,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:35,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:42:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:36,189 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:36,190 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:36,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:36,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909625110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:36,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:36,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-15 13:42:36,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390397272] [2022-02-15 13:42:36,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:42:36,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:42:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:42:36,266 INFO L87 Difference]: Start difference. First operand 1032 states and 2497 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:42:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:38,313 INFO L93 Difference]: Finished difference Result 2723 states and 6788 transitions. [2022-02-15 13:42:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:42:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 29 [2022-02-15 13:42:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:38,317 INFO L225 Difference]: With dead ends: 2723 [2022-02-15 13:42:38,317 INFO L226 Difference]: Without dead ends: 2709 [2022-02-15 13:42:38,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=705, Invalid=3327, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:42:38,318 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 341 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:38,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 198 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:42:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2022-02-15 13:42:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 1040. [2022-02-15 13:42:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.422521655437921) internal successors, (2517), 1039 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2517 transitions. [2022-02-15 13:42:38,359 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2517 transitions. Word has length 29 [2022-02-15 13:42:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 2517 transitions. [2022-02-15 13:42:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:42:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2517 transitions. [2022-02-15 13:42:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:38,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:38,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:38,378 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 13:42:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:38,576 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1843834125, now seen corresponding path program 41 times [2022-02-15 13:42:38,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:38,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71861394] [2022-02-15 13:42:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:38,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:38,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:38,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71861394] [2022-02-15 13:42:38,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71861394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:38,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443644184] [2022-02-15 13:42:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:42:38,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:38,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:38,837 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 13:42:38,838 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 13:42:38,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:42:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:39,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-15 13:42:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:39,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:39,472 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:39,472 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:39,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:39,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:39,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443644184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:39,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:39,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-15 13:42:39,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884350786] [2022-02-15 13:42:39,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:39,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:39,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:39,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:39,579 INFO L87 Difference]: Start difference. First operand 1040 states and 2517 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:41,163 INFO L93 Difference]: Finished difference Result 2387 states and 5874 transitions. [2022-02-15 13:42:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:42:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 29 [2022-02-15 13:42:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:41,166 INFO L225 Difference]: With dead ends: 2387 [2022-02-15 13:42:41,167 INFO L226 Difference]: Without dead ends: 2377 [2022-02-15 13:42:41,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=2089, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:42:41,167 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 338 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:41,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 211 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-02-15 13:42:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1034. [2022-02-15 13:42:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.4230396902226525) internal successors, (2503), 1033 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2503 transitions. [2022-02-15 13:42:41,182 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2503 transitions. Word has length 29 [2022-02-15 13:42:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:41,182 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 2503 transitions. [2022-02-15 13:42:41,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2503 transitions. [2022-02-15 13:42:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:41,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:41,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:41,199 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 13:42:41,398 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,SelfDestructingSolverStorable44 [2022-02-15 13:42:41,399 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:41,399 INFO L85 PathProgramCache]: Analyzing trace with hash 669763807, now seen corresponding path program 42 times [2022-02-15 13:42:41,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:41,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216294452] [2022-02-15 13:42:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:41,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:41,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:41,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216294452] [2022-02-15 13:42:41,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216294452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:41,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741954515] [2022-02-15 13:42:41,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:42:41,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:41,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:41,695 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 13:42:41,696 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 13:42:41,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:42:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:41,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 13:42:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:42,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:42,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-02-15 13:42:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:43,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:43,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:43,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-15 13:42:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:43,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741954515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:43,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:43,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-15 13:42:43,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770563481] [2022-02-15 13:42:43,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:43,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:42:43,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:42:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:42:43,359 INFO L87 Difference]: Start difference. First operand 1034 states and 2503 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 13:42:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:44,369 INFO L93 Difference]: Finished difference Result 1658 states and 4021 transitions. [2022-02-15 13:42:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:42:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 29 [2022-02-15 13:42:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:44,372 INFO L225 Difference]: With dead ends: 1658 [2022-02-15 13:42:44,372 INFO L226 Difference]: Without dead ends: 1635 [2022-02-15 13:42:44,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:42:44,372 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 236 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 434 Invalid, 0 Unknown, 929 Unchecked, 0.2s Time] [2022-02-15 13:42:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-02-15 13:42:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1077. [2022-02-15 13:42:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.4228624535315983) internal successors, (2607), 1076 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2607 transitions. [2022-02-15 13:42:44,385 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2607 transitions. Word has length 29 [2022-02-15 13:42:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:44,385 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 2607 transitions. [2022-02-15 13:42:44,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 13:42:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2607 transitions. [2022-02-15 13:42:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:44,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:44,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:44,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:44,601 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,SelfDestructingSolverStorable45 [2022-02-15 13:42:44,602 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1563922681, now seen corresponding path program 43 times [2022-02-15 13:42:44,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:44,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388193463] [2022-02-15 13:42:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:44,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:44,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:44,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388193463] [2022-02-15 13:42:44,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388193463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:44,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817809134] [2022-02-15 13:42:44,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:42:44,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:44,874 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 13:42:44,876 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 13:42:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:45,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:42:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:45,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:45,309 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:45,310 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:45,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:45,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817809134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:45,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:45,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:45,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806249769] [2022-02-15 13:42:45,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:45,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:45,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:45,377 INFO L87 Difference]: Start difference. First operand 1077 states and 2607 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:46,816 INFO L93 Difference]: Finished difference Result 2791 states and 6816 transitions. [2022-02-15 13:42:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:42:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 29 [2022-02-15 13:42:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:46,820 INFO L225 Difference]: With dead ends: 2791 [2022-02-15 13:42:46,820 INFO L226 Difference]: Without dead ends: 2762 [2022-02-15 13:42:46,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:42:46,821 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 297 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:46,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 367 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-02-15 13:42:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1071. [2022-02-15 13:42:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.4271028037383178) internal successors, (2597), 1070 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2597 transitions. [2022-02-15 13:42:46,838 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2597 transitions. Word has length 29 [2022-02-15 13:42:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:46,838 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 2597 transitions. [2022-02-15 13:42:46,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2597 transitions. [2022-02-15 13:42:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:46,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:46,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:46,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:47,055 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,SelfDestructingSolverStorable46 [2022-02-15 13:42:47,055 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 943435545, now seen corresponding path program 44 times [2022-02-15 13:42:47,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:47,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026747433] [2022-02-15 13:42:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:47,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:47,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:47,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026747433] [2022-02-15 13:42:47,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026747433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:47,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501057401] [2022-02-15 13:42:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:42:47,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:47,376 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 13:42:47,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:42:47,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:47,419 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 13:42:47,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:47,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:42:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:48,027 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:48,027 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:48,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:48,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:48,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:48,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501057401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:48,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:48,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:48,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803222090] [2022-02-15 13:42:48,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:48,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:48,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:48,120 INFO L87 Difference]: Start difference. First operand 1071 states and 2597 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 13:42:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:50,267 INFO L93 Difference]: Finished difference Result 3276 states and 8130 transitions. [2022-02-15 13:42:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:42:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 29 [2022-02-15 13:42:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:50,271 INFO L225 Difference]: With dead ends: 3276 [2022-02-15 13:42:50,271 INFO L226 Difference]: Without dead ends: 3257 [2022-02-15 13:42:50,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:42:50,272 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 385 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:50,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 190 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:42:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-02-15 13:42:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 1084. [2022-02-15 13:42:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.430286241920591) internal successors, (2632), 1083 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2632 transitions. [2022-02-15 13:42:50,288 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2632 transitions. Word has length 29 [2022-02-15 13:42:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:50,288 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 2632 transitions. [2022-02-15 13:42:50,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 13:42:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2632 transitions. [2022-02-15 13:42:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:50,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:50,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:50,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-15 13:42:50,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:50,503 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1608638713, now seen corresponding path program 45 times [2022-02-15 13:42:50,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:50,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124033085] [2022-02-15 13:42:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:50,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:50,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:50,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124033085] [2022-02-15 13:42:50,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124033085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:50,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179490955] [2022-02-15 13:42:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:42:50,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:50,761 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 13:42:50,763 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 13:42:50,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:42:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:51,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-15 13:42:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:51,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:51,388 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:51,388 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:42:51,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:51,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:51,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:42:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:51,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179490955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:51,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:51,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:51,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512627167] [2022-02-15 13:42:51,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:51,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:51,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:51,489 INFO L87 Difference]: Start difference. First operand 1084 states and 2632 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:42:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:52,837 INFO L93 Difference]: Finished difference Result 2866 states and 7112 transitions. [2022-02-15 13:42:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:42:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:42:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:52,841 INFO L225 Difference]: With dead ends: 2866 [2022-02-15 13:42:52,841 INFO L226 Difference]: Without dead ends: 2841 [2022-02-15 13:42:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=541, Invalid=3365, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:42:52,842 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 318 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:52,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 197 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:42:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2022-02-15 13:42:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1063. [2022-02-15 13:42:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.426553672316384) internal successors, (2577), 1062 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2577 transitions. [2022-02-15 13:42:52,860 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2577 transitions. Word has length 29 [2022-02-15 13:42:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:52,860 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 2577 transitions. [2022-02-15 13:42:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:42:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2577 transitions. [2022-02-15 13:42:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:52,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:52,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:52,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:53,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-15 13:42:53,079 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 357875503, now seen corresponding path program 46 times [2022-02-15 13:42:53,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:53,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363954720] [2022-02-15 13:42:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:53,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:53,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:53,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363954720] [2022-02-15 13:42:53,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363954720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:53,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883182931] [2022-02-15 13:42:53,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:42:53,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:53,382 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 13:42:53,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:42:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:53,404 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 13:42:53,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:42:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:53,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:53,983 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:53,984 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:54,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:54,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:54,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:54,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883182931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:54,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:54,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:42:54,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268104236] [2022-02-15 13:42:54,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:54,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:42:54,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:42:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:42:54,053 INFO L87 Difference]: Start difference. First operand 1063 states and 2577 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:54,948 INFO L93 Difference]: Finished difference Result 2486 states and 6106 transitions. [2022-02-15 13:42:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:42:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 29 [2022-02-15 13:42:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:54,952 INFO L225 Difference]: With dead ends: 2486 [2022-02-15 13:42:54,952 INFO L226 Difference]: Without dead ends: 2475 [2022-02-15 13:42:54,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:42:54,952 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 264 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:54,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 252 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:42:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-15 13:42:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1065. [2022-02-15 13:42:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.424812030075188) internal successors, (2580), 1064 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2580 transitions. [2022-02-15 13:42:54,969 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2580 transitions. Word has length 29 [2022-02-15 13:42:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:54,969 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 2580 transitions. [2022-02-15 13:42:54,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:42:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2580 transitions. [2022-02-15 13:42:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:54,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:54,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:54,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:55,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 13:42:55,187 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:55,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1755234587, now seen corresponding path program 47 times [2022-02-15 13:42:55,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:55,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502881578] [2022-02-15 13:42:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:55,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:55,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:55,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502881578] [2022-02-15 13:42:55,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502881578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:55,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684869980] [2022-02-15 13:42:55,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:42:55,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:55,417 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 13:42:55,418 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 13:42:55,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:42:55,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:42:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:55,671 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-15 13:42:55,672 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 116 treesize of output 82 [2022-02-15 13:42:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:55,879 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:42:55,879 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:42:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:42:55,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:55,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:42:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:55,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684869980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:55,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:55,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:42:55,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804685528] [2022-02-15 13:42:55,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:55,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:42:55,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:42:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:42:55,966 INFO L87 Difference]: Start difference. First operand 1065 states and 2580 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 13:42:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:42:56,880 INFO L93 Difference]: Finished difference Result 2585 states and 6371 transitions. [2022-02-15 13:42:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:42:56,880 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 29 [2022-02-15 13:42:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:42:56,884 INFO L225 Difference]: With dead ends: 2585 [2022-02-15 13:42:56,884 INFO L226 Difference]: Without dead ends: 2576 [2022-02-15 13:42:56,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:42:56,884 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 360 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:42:56,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 246 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:42:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-02-15 13:42:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1101. [2022-02-15 13:42:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.421818181818182) internal successors, (2664), 1100 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:42:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2664 transitions. [2022-02-15 13:42:56,900 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2664 transitions. Word has length 29 [2022-02-15 13:42:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:42:56,901 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2664 transitions. [2022-02-15 13:42:56,901 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 13:42:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2664 transitions. [2022-02-15 13:42:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:42:56,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:42:56,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:42:56,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 13:42:57,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:57,115 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:42:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:42:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2044962201, now seen corresponding path program 48 times [2022-02-15 13:42:57,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:42:57,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949538514] [2022-02-15 13:42:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:42:57,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:42:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:42:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:57,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:42:57,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949538514] [2022-02-15 13:42:57,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949538514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:42:57,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280353606] [2022-02-15 13:42:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:42:57,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:42:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:42:57,369 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 13:42:57,370 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 13:42:57,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:42:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:42:57,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:42:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:42:57,873 INFO L353 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2022-02-15 13:42:57,873 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 90 [2022-02-15 13:42:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:58,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:42:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:42:58,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:42:58,904 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:42:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:42:58,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280353606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:42:58,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:42:58,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-15 13:42:58,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716564235] [2022-02-15 13:42:58,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:42:58,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:42:58,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:42:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:42:58,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:42:58,970 INFO L87 Difference]: Start difference. First operand 1101 states and 2664 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 13:43:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:00,757 INFO L93 Difference]: Finished difference Result 2404 states and 5923 transitions. [2022-02-15 13:43:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:43:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 29 [2022-02-15 13:43:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:00,761 INFO L225 Difference]: With dead ends: 2404 [2022-02-15 13:43:00,761 INFO L226 Difference]: Without dead ends: 2393 [2022-02-15 13:43:00,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=647, Invalid=3258, Unknown=1, NotChecked=0, Total=3906 [2022-02-15 13:43:00,761 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 286 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:00,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 280 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 950 Invalid, 0 Unknown, 1318 Unchecked, 0.4s Time] [2022-02-15 13:43:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2022-02-15 13:43:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 1105. [2022-02-15 13:43:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.421195652173913) internal successors, (2673), 1104 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2673 transitions. [2022-02-15 13:43:00,776 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2673 transitions. Word has length 29 [2022-02-15 13:43:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 2673 transitions. [2022-02-15 13:43:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 13:43:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2673 transitions. [2022-02-15 13:43:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:00,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:00,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:00,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:00,993 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,SelfDestructingSolverStorable51 [2022-02-15 13:43:00,993 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash -151457595, now seen corresponding path program 49 times [2022-02-15 13:43:00,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:00,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351779363] [2022-02-15 13:43:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:01,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:01,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351779363] [2022-02-15 13:43:01,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351779363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:01,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740307080] [2022-02-15 13:43:01,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:43:01,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:01,275 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 13:43:01,277 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 13:43:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:01,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:43:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:01,892 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:01,892 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:01,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:01,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:02,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740307080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:02,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:02,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:02,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003334159] [2022-02-15 13:43:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:02,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:02,014 INFO L87 Difference]: Start difference. First operand 1105 states and 2673 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:03,461 INFO L93 Difference]: Finished difference Result 3071 states and 7589 transitions. [2022-02-15 13:43:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:43:03,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 29 [2022-02-15 13:43:03,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:03,466 INFO L225 Difference]: With dead ends: 3071 [2022-02-15 13:43:03,466 INFO L226 Difference]: Without dead ends: 3058 [2022-02-15 13:43:03,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:43:03,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 282 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:03,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 197 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-02-15 13:43:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 1136. [2022-02-15 13:43:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.428193832599119) internal successors, (2756), 1135 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2756 transitions. [2022-02-15 13:43:03,484 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2756 transitions. Word has length 29 [2022-02-15 13:43:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:03,484 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 2756 transitions. [2022-02-15 13:43:03,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2756 transitions. [2022-02-15 13:43:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:03,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:03,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:03,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:03,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:03,702 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 513745573, now seen corresponding path program 50 times [2022-02-15 13:43:03,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:03,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563264027] [2022-02-15 13:43:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:03,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:03,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:03,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563264027] [2022-02-15 13:43:03,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563264027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:03,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512755026] [2022-02-15 13:43:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:43:03,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:03,996 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 13:43:04,059 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 13:43:04,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:43:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:04,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:43:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:04,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:04,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:04,615 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:04,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:04,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:04,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:04,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512755026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:04,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:04,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:43:04,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894662282] [2022-02-15 13:43:04,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:04,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:04,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:04,703 INFO L87 Difference]: Start difference. First operand 1136 states and 2756 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:05,710 INFO L93 Difference]: Finished difference Result 2506 states and 6180 transitions. [2022-02-15 13:43:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:43:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:43:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:05,714 INFO L225 Difference]: With dead ends: 2506 [2022-02-15 13:43:05,714 INFO L226 Difference]: Without dead ends: 2489 [2022-02-15 13:43:05,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:43:05,714 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:05,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 158 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-02-15 13:43:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1120. [2022-02-15 13:43:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.4244861483467384) internal successors, (2713), 1119 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2713 transitions. [2022-02-15 13:43:05,732 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2713 transitions. Word has length 29 [2022-02-15 13:43:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:05,732 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 2713 transitions. [2022-02-15 13:43:05,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2713 transitions. [2022-02-15 13:43:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:05,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:05,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:05,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:05,950 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,SelfDestructingSolverStorable53 [2022-02-15 13:43:05,950 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 977071387, now seen corresponding path program 51 times [2022-02-15 13:43:05,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:05,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11295624] [2022-02-15 13:43:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:05,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:06,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:06,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11295624] [2022-02-15 13:43:06,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11295624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:06,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179981335] [2022-02-15 13:43:06,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:43:06,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:06,195 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 13:43:06,196 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 13:43:06,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:43:06,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:06,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:43:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:06,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:43:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:06,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:06,664 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:06,665 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:06,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:06,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:06,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179981335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:06,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:06,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 30 [2022-02-15 13:43:06,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039773576] [2022-02-15 13:43:06,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:06,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:43:06,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:43:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:43:06,741 INFO L87 Difference]: Start difference. First operand 1120 states and 2713 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 13:43:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:07,640 INFO L93 Difference]: Finished difference Result 2569 states and 6334 transitions. [2022-02-15 13:43:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:43:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 29 [2022-02-15 13:43:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:07,643 INFO L225 Difference]: With dead ends: 2569 [2022-02-15 13:43:07,643 INFO L226 Difference]: Without dead ends: 2560 [2022-02-15 13:43:07,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 13:43:07,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 285 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:07,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 285 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-02-15 13:43:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1119. [2022-02-15 13:43:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.424865831842576) internal successors, (2711), 1118 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2711 transitions. [2022-02-15 13:43:07,687 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2711 transitions. Word has length 29 [2022-02-15 13:43:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:07,703 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 2711 transitions. [2022-02-15 13:43:07,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 13:43:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2711 transitions. [2022-02-15 13:43:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:07,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:07,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:07,737 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 13:43:07,905 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,SelfDestructingSolverStorable54 [2022-02-15 13:43:07,905 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash -270744883, now seen corresponding path program 52 times [2022-02-15 13:43:07,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:07,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273758826] [2022-02-15 13:43:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:07,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:08,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:08,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273758826] [2022-02-15 13:43:08,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273758826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:08,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115950029] [2022-02-15 13:43:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:43:08,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:08,132 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 13:43:08,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:43:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:08,166 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 13:43:08,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-02-15 13:43:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:08,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:08,698 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:08,698 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:08,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:08,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115950029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:08,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:08,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:08,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549360331] [2022-02-15 13:43:08,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:08,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:08,784 INFO L87 Difference]: Start difference. First operand 1119 states and 2711 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 13:43:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:10,043 INFO L93 Difference]: Finished difference Result 2743 states and 6732 transitions. [2022-02-15 13:43:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:43:10,043 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 29 [2022-02-15 13:43:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:10,047 INFO L225 Difference]: With dead ends: 2743 [2022-02-15 13:43:10,047 INFO L226 Difference]: Without dead ends: 2725 [2022-02-15 13:43:10,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:43:10,047 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 325 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:10,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 304 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2022-02-15 13:43:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1101. [2022-02-15 13:43:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.421818181818182) internal successors, (2664), 1100 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2664 transitions. [2022-02-15 13:43:10,064 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2664 transitions. Word has length 29 [2022-02-15 13:43:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:10,064 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2664 transitions. [2022-02-15 13:43:10,064 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 13:43:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2664 transitions. [2022-02-15 13:43:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:10,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:10,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:10,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:10,281 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -375581373, now seen corresponding path program 53 times [2022-02-15 13:43:10,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:10,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482590716] [2022-02-15 13:43:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:10,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:10,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:10,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482590716] [2022-02-15 13:43:10,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482590716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:10,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168578031] [2022-02-15 13:43:10,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:43:10,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:10,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:10,511 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 13:43:10,512 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 13:43:10,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:43:10,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:10,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:43:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:10,942 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:10,943 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:10,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:11,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168578031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:11,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:11,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:11,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874787914] [2022-02-15 13:43:11,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:11,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:11,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:11,049 INFO L87 Difference]: Start difference. First operand 1101 states and 2664 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 13:43:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:13,102 INFO L93 Difference]: Finished difference Result 2712 states and 6682 transitions. [2022-02-15 13:43:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:43:13,102 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 29 [2022-02-15 13:43:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:13,105 INFO L225 Difference]: With dead ends: 2712 [2022-02-15 13:43:13,105 INFO L226 Difference]: Without dead ends: 2683 [2022-02-15 13:43:13,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=2973, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:43:13,106 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 365 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:13,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 257 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:43:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-02-15 13:43:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1148. [2022-02-15 13:43:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 2.4324324324324325) internal successors, (2790), 1147 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2790 transitions. [2022-02-15 13:43:13,121 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2790 transitions. Word has length 29 [2022-02-15 13:43:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 2790 transitions. [2022-02-15 13:43:13,121 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 13:43:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2790 transitions. [2022-02-15 13:43:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:13,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:13,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:13,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:13,338 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -101909635, now seen corresponding path program 54 times [2022-02-15 13:43:13,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:13,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747440972] [2022-02-15 13:43:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:13,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:13,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:13,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747440972] [2022-02-15 13:43:13,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747440972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:13,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722263792] [2022-02-15 13:43:13,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:43:13,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:13,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:13,630 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 13:43:13,631 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 13:43:13,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:43:13,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:13,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:13,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:43:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:13,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:14,214 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:14,215 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:14,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:14,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:14,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722263792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:14,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:14,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:14,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201662683] [2022-02-15 13:43:14,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:14,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:14,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:14,317 INFO L87 Difference]: Start difference. First operand 1148 states and 2790 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:16,644 INFO L93 Difference]: Finished difference Result 3319 states and 8242 transitions. [2022-02-15 13:43:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:43:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 29 [2022-02-15 13:43:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:16,650 INFO L225 Difference]: With dead ends: 3319 [2022-02-15 13:43:16,650 INFO L226 Difference]: Without dead ends: 3294 [2022-02-15 13:43:16,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=885, Invalid=4665, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:43:16,651 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 455 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:16,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 171 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:43:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2022-02-15 13:43:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 1157. [2022-02-15 13:43:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.4333910034602075) internal successors, (2813), 1156 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2813 transitions. [2022-02-15 13:43:16,672 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2813 transitions. Word has length 29 [2022-02-15 13:43:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:16,673 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2813 transitions. [2022-02-15 13:43:16,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2813 transitions. [2022-02-15 13:43:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:16,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:16,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:16,715 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 13:43:16,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:16,890 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 563293533, now seen corresponding path program 55 times [2022-02-15 13:43:16,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:16,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320416801] [2022-02-15 13:43:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:16,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:17,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:17,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320416801] [2022-02-15 13:43:17,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320416801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:17,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593750094] [2022-02-15 13:43:17,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:43:17,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:17,201 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 13:43:17,237 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 13:43:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:17,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:17,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:43:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:17,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:17,829 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:17,830 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:17,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:17,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:17,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:17,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593750094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:17,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:17,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:43:17,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761069433] [2022-02-15 13:43:17,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:17,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:17,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:17,930 INFO L87 Difference]: Start difference. First operand 1157 states and 2813 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:19,347 INFO L93 Difference]: Finished difference Result 2614 states and 6467 transitions. [2022-02-15 13:43:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:43:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:43:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:19,351 INFO L225 Difference]: With dead ends: 2614 [2022-02-15 13:43:19,351 INFO L226 Difference]: Without dead ends: 2587 [2022-02-15 13:43:19,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=471, Invalid=2721, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:43:19,351 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 367 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 169 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-02-15 13:43:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1137. [2022-02-15 13:43:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.4286971830985915) internal successors, (2759), 1136 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2759 transitions. [2022-02-15 13:43:19,367 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2759 transitions. Word has length 29 [2022-02-15 13:43:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:19,367 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2759 transitions. [2022-02-15 13:43:19,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2759 transitions. [2022-02-15 13:43:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:19,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:19,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:19,384 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 13:43:19,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-15 13:43:19,584 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1463713709, now seen corresponding path program 56 times [2022-02-15 13:43:19,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:19,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997250258] [2022-02-15 13:43:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:19,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:19,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:19,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997250258] [2022-02-15 13:43:19,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997250258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:19,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291162472] [2022-02-15 13:43:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:43:19,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:19,858 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 13:43:19,858 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 13:43:19,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:43:19,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:20,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:43:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:20,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:20,465 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:20,465 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:20,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:20,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291162472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:20,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:20,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-15 13:43:20,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356247147] [2022-02-15 13:43:20,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:20,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:43:20,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:20,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:43:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:43:20,567 INFO L87 Difference]: Start difference. First operand 1137 states and 2759 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:22,622 INFO L93 Difference]: Finished difference Result 3629 states and 9144 transitions. [2022-02-15 13:43:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:43:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 29 [2022-02-15 13:43:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:22,627 INFO L225 Difference]: With dead ends: 3629 [2022-02-15 13:43:22,628 INFO L226 Difference]: Without dead ends: 3610 [2022-02-15 13:43:22,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=4024, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:43:22,628 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 355 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:22,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 200 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:43:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-02-15 13:43:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 1155. [2022-02-15 13:43:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.431542461005199) internal successors, (2806), 1154 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2806 transitions. [2022-02-15 13:43:22,650 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2806 transitions. Word has length 29 [2022-02-15 13:43:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:22,650 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 2806 transitions. [2022-02-15 13:43:22,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2806 transitions. [2022-02-15 13:43:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:22,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:22,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:22,669 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 13:43:22,867 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,SelfDestructingSolverStorable59 [2022-02-15 13:43:22,867 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1074852537, now seen corresponding path program 57 times [2022-02-15 13:43:22,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:22,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343088093] [2022-02-15 13:43:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:22,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:23,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:23,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343088093] [2022-02-15 13:43:23,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343088093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:23,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364256581] [2022-02-15 13:43:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:43:23,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:23,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:23,093 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 13:43:23,094 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 13:43:23,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:43:23,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:23,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:23,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:43:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:23,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:23,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:23,563 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:23,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:23,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:23,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:23,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364256581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:23,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:23,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-15 13:43:23,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850640356] [2022-02-15 13:43:23,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:23,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:43:23,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:43:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:43:23,647 INFO L87 Difference]: Start difference. First operand 1155 states and 2806 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:43:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:25,391 INFO L93 Difference]: Finished difference Result 2954 states and 7370 transitions. [2022-02-15 13:43:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:43:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 29 [2022-02-15 13:43:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:25,395 INFO L225 Difference]: With dead ends: 2954 [2022-02-15 13:43:25,395 INFO L226 Difference]: Without dead ends: 2926 [2022-02-15 13:43:25,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:43:25,396 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 424 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 171 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-02-15 13:43:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1146. [2022-02-15 13:43:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.4305676855895197) internal successors, (2783), 1145 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2783 transitions. [2022-02-15 13:43:25,413 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2783 transitions. Word has length 29 [2022-02-15 13:43:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:25,413 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 2783 transitions. [2022-02-15 13:43:25,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 13:43:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2783 transitions. [2022-02-15 13:43:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:25,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:25,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:25,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:25,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:25,618 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash 454101531, now seen corresponding path program 58 times [2022-02-15 13:43:25,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:25,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740116597] [2022-02-15 13:43:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:25,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:25,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:25,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740116597] [2022-02-15 13:43:25,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740116597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:25,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678224068] [2022-02-15 13:43:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:43:25,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:25,932 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 13:43:25,944 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 13:43:25,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:43:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:26,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-02-15 13:43:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:26,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:26,484 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:26,485 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:26,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:26,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:26,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:26,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678224068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:26,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:26,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-15 13:43:26,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841624037] [2022-02-15 13:43:26,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:26,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:26,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:26,583 INFO L87 Difference]: Start difference. First operand 1146 states and 2783 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:43:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:28,206 INFO L93 Difference]: Finished difference Result 2632 states and 6501 transitions. [2022-02-15 13:43:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:43:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 29 [2022-02-15 13:43:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:28,209 INFO L225 Difference]: With dead ends: 2632 [2022-02-15 13:43:28,209 INFO L226 Difference]: Without dead ends: 2619 [2022-02-15 13:43:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=2844, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:43:28,215 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 345 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 203 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:43:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-15 13:43:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1143. [2022-02-15 13:43:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.4308231173380035) internal successors, (2776), 1142 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2776 transitions. [2022-02-15 13:43:28,246 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2776 transitions. Word has length 29 [2022-02-15 13:43:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:28,247 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 2776 transitions. [2022-02-15 13:43:28,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 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 13:43:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2776 transitions. [2022-02-15 13:43:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:28,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:28,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:28,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-15 13:43:28,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:28,460 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash -213576143, now seen corresponding path program 59 times [2022-02-15 13:43:28,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:28,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522891166] [2022-02-15 13:43:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:28,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:28,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:28,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522891166] [2022-02-15 13:43:28,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522891166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:28,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63632002] [2022-02-15 13:43:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:43:28,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:28,661 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 13:43:28,663 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 13:43:28,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:43:28,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:28,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:43:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:28,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:29,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:29,087 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:29,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:29,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:29,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:29,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63632002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:29,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:29,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:29,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533334177] [2022-02-15 13:43:29,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:29,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:29,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:29,157 INFO L87 Difference]: Start difference. First operand 1143 states and 2776 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 13:43:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:30,693 INFO L93 Difference]: Finished difference Result 3206 states and 7859 transitions. [2022-02-15 13:43:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:43:30,693 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 29 [2022-02-15 13:43:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:30,697 INFO L225 Difference]: With dead ends: 3206 [2022-02-15 13:43:30,697 INFO L226 Difference]: Without dead ends: 3169 [2022-02-15 13:43:30,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=521, Invalid=3639, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:43:30,698 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:30,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 294 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2022-02-15 13:43:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 1168. [2022-02-15 13:43:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4318766066838045) internal successors, (2838), 1167 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2838 transitions. [2022-02-15 13:43:30,737 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2838 transitions. Word has length 29 [2022-02-15 13:43:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:30,737 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 2838 transitions. [2022-02-15 13:43:30,737 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 13:43:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2838 transitions. [2022-02-15 13:43:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:30,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:30,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:30,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:30,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:30,956 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash 60095595, now seen corresponding path program 60 times [2022-02-15 13:43:30,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:30,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847945942] [2022-02-15 13:43:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:31,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:31,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847945942] [2022-02-15 13:43:31,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847945942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:31,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248661874] [2022-02-15 13:43:31,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:43:31,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:31,178 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 13:43:31,195 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 13:43:31,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:43:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:31,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:31,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:43:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:31,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:31,659 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:31,659 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:31,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:31,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:31,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248661874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:31,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:31,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:31,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599503137] [2022-02-15 13:43:31,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:31,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:31,741 INFO L87 Difference]: Start difference. First operand 1168 states and 2838 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:33,700 INFO L93 Difference]: Finished difference Result 3662 states and 9117 transitions. [2022-02-15 13:43:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:43:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 29 [2022-02-15 13:43:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:33,705 INFO L225 Difference]: With dead ends: 3662 [2022-02-15 13:43:33,705 INFO L226 Difference]: Without dead ends: 3643 [2022-02-15 13:43:33,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=821, Invalid=4879, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:43:33,706 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 431 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:33,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 221 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-02-15 13:43:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 1181. [2022-02-15 13:43:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4347457627118643) internal successors, (2873), 1180 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2873 transitions. [2022-02-15 13:43:33,729 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2873 transitions. Word has length 29 [2022-02-15 13:43:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:33,729 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 2873 transitions. [2022-02-15 13:43:33,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 13:43:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2873 transitions. [2022-02-15 13:43:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:33,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:33,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:33,746 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 13:43:33,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:33,943 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash 725298763, now seen corresponding path program 61 times [2022-02-15 13:43:33,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:33,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747099371] [2022-02-15 13:43:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:33,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:34,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:34,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747099371] [2022-02-15 13:43:34,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747099371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:34,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195054285] [2022-02-15 13:43:34,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:43:34,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:34,179 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 13:43:34,195 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 13:43:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:34,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:34,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:34,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-15 13:43:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:34,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:34,602 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:34,603 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:34,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:34,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:34,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195054285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:34,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:34,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:43:34,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766309979] [2022-02-15 13:43:34,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:34,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:34,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:34,678 INFO L87 Difference]: Start difference. First operand 1181 states and 2873 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:35,922 INFO L93 Difference]: Finished difference Result 2892 states and 7171 transitions. [2022-02-15 13:43:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:43:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:43:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:35,926 INFO L225 Difference]: With dead ends: 2892 [2022-02-15 13:43:35,926 INFO L226 Difference]: Without dead ends: 2863 [2022-02-15 13:43:35,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:43:35,927 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 328 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:35,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 210 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-02-15 13:43:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 1184. [2022-02-15 13:43:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.4344885883347422) internal successors, (2880), 1183 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2880 transitions. [2022-02-15 13:43:35,944 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2880 transitions. Word has length 29 [2022-02-15 13:43:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:35,944 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 2880 transitions. [2022-02-15 13:43:35,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2880 transitions. [2022-02-15 13:43:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:35,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:35,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:35,962 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 13:43:36,149 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,SelfDestructingSolverStorable64 [2022-02-15 13:43:36,149 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash -525464447, now seen corresponding path program 62 times [2022-02-15 13:43:36,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:36,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121253110] [2022-02-15 13:43:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:36,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:36,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:36,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121253110] [2022-02-15 13:43:36,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121253110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:36,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594629072] [2022-02-15 13:43:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:43:36,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:36,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:36,414 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 13:43:36,435 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 13:43:36,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:43:36,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:36,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:36,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:43:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:36,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:37,099 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:37,100 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:37,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:37,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:37,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594629072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:37,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:37,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:43:37,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088094718] [2022-02-15 13:43:37,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:37,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:43:37,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:43:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:43:37,217 INFO L87 Difference]: Start difference. First operand 1184 states and 2880 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 13:43:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:38,702 INFO L93 Difference]: Finished difference Result 2784 states and 6870 transitions. [2022-02-15 13:43:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:43:38,703 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 29 [2022-02-15 13:43:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:38,706 INFO L225 Difference]: With dead ends: 2784 [2022-02-15 13:43:38,706 INFO L226 Difference]: Without dead ends: 2773 [2022-02-15 13:43:38,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=2327, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:43:38,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 312 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:38,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 334 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:43:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2022-02-15 13:43:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1181. [2022-02-15 13:43:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4347457627118643) internal successors, (2873), 1180 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2873 transitions. [2022-02-15 13:43:38,725 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2873 transitions. Word has length 29 [2022-02-15 13:43:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:38,725 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 2873 transitions. [2022-02-15 13:43:38,725 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 13:43:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2873 transitions. [2022-02-15 13:43:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:38,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:38,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:38,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:38,942 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:38,943 INFO L85 PathProgramCache]: Analyzing trace with hash 242889651, now seen corresponding path program 63 times [2022-02-15 13:43:38,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:38,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855717099] [2022-02-15 13:43:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:38,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:39,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:39,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855717099] [2022-02-15 13:43:39,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855717099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:39,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118436651] [2022-02-15 13:43:39,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:43:39,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:39,140 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 13:43:39,141 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 13:43:39,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:43:39,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:39,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:39,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:43:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:39,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:39,622 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:39,622 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:39,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:39,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:39,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118436651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:39,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:39,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-15 13:43:39,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479785209] [2022-02-15 13:43:39,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:39,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:39,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:39,717 INFO L87 Difference]: Start difference. First operand 1181 states and 2873 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:43:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:40,916 INFO L93 Difference]: Finished difference Result 2937 states and 7332 transitions. [2022-02-15 13:43:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:43:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 29 [2022-02-15 13:43:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:40,920 INFO L225 Difference]: With dead ends: 2937 [2022-02-15 13:43:40,920 INFO L226 Difference]: Without dead ends: 2926 [2022-02-15 13:43:40,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:43:40,922 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 227 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:40,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 234 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:43:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-02-15 13:43:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1218. [2022-02-15 13:43:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.441248972884141) internal successors, (2971), 1217 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2971 transitions. [2022-02-15 13:43:40,941 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2971 transitions. Word has length 29 [2022-02-15 13:43:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:40,941 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 2971 transitions. [2022-02-15 13:43:40,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:43:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2971 transitions. [2022-02-15 13:43:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:40,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:40,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:40,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:41,148 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,SelfDestructingSolverStorable66 [2022-02-15 13:43:41,149 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash 516561389, now seen corresponding path program 64 times [2022-02-15 13:43:41,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:41,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522864008] [2022-02-15 13:43:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:41,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:41,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:41,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522864008] [2022-02-15 13:43:41,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522864008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:41,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244012448] [2022-02-15 13:43:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:43:41,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:41,408 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 13:43:41,408 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 13:43:41,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:43:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:41,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:43:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:41,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:42,010 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:42,011 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:42,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:42,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:42,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244012448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:42,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:42,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-15 13:43:42,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048106012] [2022-02-15 13:43:42,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:42,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:43:42,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:43:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:43:42,121 INFO L87 Difference]: Start difference. First operand 1218 states and 2971 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:42,934 INFO L93 Difference]: Finished difference Result 2821 states and 7062 transitions. [2022-02-15 13:43:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:43:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 29 [2022-02-15 13:43:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:42,938 INFO L225 Difference]: With dead ends: 2821 [2022-02-15 13:43:42,938 INFO L226 Difference]: Without dead ends: 2810 [2022-02-15 13:43:42,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:43:42,938 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:42,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 150 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:43:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-02-15 13:43:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1222. [2022-02-15 13:43:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.444717444717445) internal successors, (2985), 1221 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2985 transitions. [2022-02-15 13:43:42,954 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2985 transitions. Word has length 29 [2022-02-15 13:43:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:42,955 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 2985 transitions. [2022-02-15 13:43:42,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2985 transitions. [2022-02-15 13:43:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:42,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:42,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:42,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:43,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-15 13:43:43,172 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1181764557, now seen corresponding path program 65 times [2022-02-15 13:43:43,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:43,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983284163] [2022-02-15 13:43:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:43,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:43,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:43,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983284163] [2022-02-15 13:43:43,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983284163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:43,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064628924] [2022-02-15 13:43:43,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:43:43,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:43,354 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 13:43:43,356 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 13:43:43,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:43:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:43,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:43:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:43,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:43,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:43,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:43:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:43,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:43:43,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2022-02-15 13:43:43,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:43,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:44,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064628924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:44,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:44,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-15 13:43:44,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259366568] [2022-02-15 13:43:44,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:44,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:43:44,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:43:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:43:44,006 INFO L87 Difference]: Start difference. First operand 1222 states and 2985 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 13:43:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:45,933 INFO L93 Difference]: Finished difference Result 2750 states and 6860 transitions. [2022-02-15 13:43:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:43:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 29 [2022-02-15 13:43:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:45,936 INFO L225 Difference]: With dead ends: 2750 [2022-02-15 13:43:45,936 INFO L226 Difference]: Without dead ends: 2735 [2022-02-15 13:43:45,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=828, Invalid=5178, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:43:45,937 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 385 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:45,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 159 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-02-15 13:43:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1265. [2022-02-15 13:43:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.4533227848101267) internal successors, (3101), 1264 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 3101 transitions. [2022-02-15 13:43:45,954 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 3101 transitions. Word has length 29 [2022-02-15 13:43:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:45,954 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 3101 transitions. [2022-02-15 13:43:45,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 13:43:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 3101 transitions. [2022-02-15 13:43:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:45,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:45,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:45,974 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 13:43:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-15 13:43:46,172 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1770754815, now seen corresponding path program 66 times [2022-02-15 13:43:46,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:46,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392735394] [2022-02-15 13:43:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:46,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:46,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:46,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392735394] [2022-02-15 13:43:46,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392735394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:46,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425863854] [2022-02-15 13:43:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:43:46,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:46,443 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 13:43:46,443 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 13:43:46,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:43:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:46,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-15 13:43:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:47,090 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:47,090 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:47,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:47,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:47,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425863854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:47,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:47,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-15 13:43:47,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182023834] [2022-02-15 13:43:47,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:47,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:43:47,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:43:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:43:47,203 INFO L87 Difference]: Start difference. First operand 1265 states and 3101 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:48,798 INFO L93 Difference]: Finished difference Result 3632 states and 9137 transitions. [2022-02-15 13:43:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:43:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 29 [2022-02-15 13:43:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:48,803 INFO L225 Difference]: With dead ends: 3632 [2022-02-15 13:43:48,803 INFO L226 Difference]: Without dead ends: 3597 [2022-02-15 13:43:48,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:43:48,803 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 311 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:48,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 185 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2022-02-15 13:43:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1240. [2022-02-15 13:43:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.4414850686037126) internal successors, (3025), 1239 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3025 transitions. [2022-02-15 13:43:48,823 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3025 transitions. Word has length 29 [2022-02-15 13:43:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:48,824 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3025 transitions. [2022-02-15 13:43:48,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 13:43:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3025 transitions. [2022-02-15 13:43:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:48,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:48,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:48,841 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 13:43:49,041 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,SelfDestructingSolverStorable69 [2022-02-15 13:43:49,041 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1875666015, now seen corresponding path program 67 times [2022-02-15 13:43:49,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:49,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942870914] [2022-02-15 13:43:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:49,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:49,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:49,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942870914] [2022-02-15 13:43:49,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942870914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:49,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864603573] [2022-02-15 13:43:49,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:43:49,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:49,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:49,242 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 13:43:49,242 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 13:43:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:49,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:49,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:43:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:49,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:49,651 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:49,651 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:43:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:49,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:49,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:43:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:49,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864603573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:49,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:49,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:43:49,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617867428] [2022-02-15 13:43:49,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:49,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:49,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:49,732 INFO L87 Difference]: Start difference. First operand 1240 states and 3025 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:43:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:51,054 INFO L93 Difference]: Finished difference Result 3126 states and 7818 transitions. [2022-02-15 13:43:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:43:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 29 [2022-02-15 13:43:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:51,058 INFO L225 Difference]: With dead ends: 3126 [2022-02-15 13:43:51,059 INFO L226 Difference]: Without dead ends: 3111 [2022-02-15 13:43:51,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=2845, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:43:51,059 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:51,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 226 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-02-15 13:43:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1256. [2022-02-15 13:43:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.446215139442231) internal successors, (3070), 1255 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 3070 transitions. [2022-02-15 13:43:51,080 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 3070 transitions. Word has length 29 [2022-02-15 13:43:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:51,081 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 3070 transitions. [2022-02-15 13:43:51,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:43:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 3070 transitions. [2022-02-15 13:43:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:51,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:51,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:51,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:51,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:51,296 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash -662900231, now seen corresponding path program 68 times [2022-02-15 13:43:51,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:51,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364579157] [2022-02-15 13:43:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:51,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:51,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:51,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364579157] [2022-02-15 13:43:51,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364579157] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:51,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673020795] [2022-02-15 13:43:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:43:51,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:51,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:51,558 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 13:43:51,558 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 13:43:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:43:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:51,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:43:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:51,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:43:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:52,069 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:43:52,069 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:43:52,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:43:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:52,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:43:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:52,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673020795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:52,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:52,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:43:52,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067321611] [2022-02-15 13:43:52,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:52,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:43:52,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:43:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:43:52,196 INFO L87 Difference]: Start difference. First operand 1256 states and 3070 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:53,360 INFO L93 Difference]: Finished difference Result 3150 states and 7852 transitions. [2022-02-15 13:43:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:43:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:43:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:53,364 INFO L225 Difference]: With dead ends: 3150 [2022-02-15 13:43:53,364 INFO L226 Difference]: Without dead ends: 3116 [2022-02-15 13:43:53,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:43:53,365 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 338 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:53,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 211 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:43:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-02-15 13:43:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1249. [2022-02-15 13:43:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.4423076923076925) internal successors, (3048), 1248 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3048 transitions. [2022-02-15 13:43:53,396 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3048 transitions. Word has length 29 [2022-02-15 13:43:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:53,396 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 3048 transitions. [2022-02-15 13:43:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:43:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3048 transitions. [2022-02-15 13:43:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:53,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:53,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:53,418 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 13:43:53,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:53,615 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:53,616 INFO L85 PathProgramCache]: Analyzing trace with hash 866053837, now seen corresponding path program 69 times [2022-02-15 13:43:53,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:53,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580033363] [2022-02-15 13:43:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:53,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:53,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:53,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580033363] [2022-02-15 13:43:53,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580033363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:53,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688427096] [2022-02-15 13:43:53,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:43:53,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:53,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:53,843 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 13:43:53,844 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 13:43:53,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:43:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:53,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:43:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:54,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:43:54,311 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 3 case distinctions, treesize of input 26 treesize of output 42 [2022-02-15 13:43:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:54,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:43:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:43:55,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:43:55,350 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:43:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:55,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688427096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:43:55,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:43:55,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-15 13:43:55,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382533624] [2022-02-15 13:43:55,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:43:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:43:55,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:43:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:43:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:43:55,428 INFO L87 Difference]: Start difference. First operand 1249 states and 3048 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 13:43:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:43:59,282 INFO L93 Difference]: Finished difference Result 3511 states and 8720 transitions. [2022-02-15 13:43:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:43:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 29 [2022-02-15 13:43:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:43:59,287 INFO L225 Difference]: With dead ends: 3511 [2022-02-15 13:43:59,287 INFO L226 Difference]: Without dead ends: 3475 [2022-02-15 13:43:59,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:43:59,288 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 470 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1385 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:43:59,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 256 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1760 Invalid, 0 Unknown, 1385 Unchecked, 0.9s Time] [2022-02-15 13:43:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-02-15 13:43:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 1262. [2022-02-15 13:43:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.443298969072165) internal successors, (3081), 1261 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:43:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3081 transitions. [2022-02-15 13:43:59,308 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3081 transitions. Word has length 29 [2022-02-15 13:43:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:43:59,308 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3081 transitions. [2022-02-15 13:43:59,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 13:43:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3081 transitions. [2022-02-15 13:43:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:43:59,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:43:59,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:43:59,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 13:43:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:59,523 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:43:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:43:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash 368061235, now seen corresponding path program 70 times [2022-02-15 13:43:59,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:43:59,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754477773] [2022-02-15 13:43:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:43:59,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:43:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:43:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:59,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:43:59,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754477773] [2022-02-15 13:43:59,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754477773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:43:59,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204526339] [2022-02-15 13:43:59,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:43:59,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:43:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:43:59,718 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 13:43:59,719 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 13:43:59,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:43:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:43:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:43:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:43:59,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:43:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:43:59,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:00,109 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:00,109 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:00,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:00,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:00,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:00,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204526339] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:00,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:00,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:44:00,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220588633] [2022-02-15 13:44:00,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:00,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:44:00,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:44:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:44:00,177 INFO L87 Difference]: Start difference. First operand 1262 states and 3081 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:44:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:01,200 INFO L93 Difference]: Finished difference Result 3406 states and 8543 transitions. [2022-02-15 13:44:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:44:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 29 [2022-02-15 13:44:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:01,204 INFO L225 Difference]: With dead ends: 3406 [2022-02-15 13:44:01,204 INFO L226 Difference]: Without dead ends: 3391 [2022-02-15 13:44:01,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:44:01,205 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 242 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:01,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 275 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:44:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-02-15 13:44:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 1290. [2022-02-15 13:44:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 2.4499612102404966) internal successors, (3158), 1289 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3158 transitions. [2022-02-15 13:44:01,227 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3158 transitions. Word has length 29 [2022-02-15 13:44:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:01,227 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3158 transitions. [2022-02-15 13:44:01,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 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 13:44:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3158 transitions. [2022-02-15 13:44:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:01,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:01,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:01,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:01,441 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,SelfDestructingSolverStorable73 [2022-02-15 13:44:01,441 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2124462285, now seen corresponding path program 71 times [2022-02-15 13:44:01,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:01,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623089933] [2022-02-15 13:44:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:01,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:01,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:01,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623089933] [2022-02-15 13:44:01,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623089933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:01,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936547421] [2022-02-15 13:44:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:44:01,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:01,707 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 13:44:01,708 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 13:44:01,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:44:01,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:44:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:02,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:44:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:02,229 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:02,229 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:44:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:02,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:02,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:02,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936547421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:02,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:02,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-15 13:44:02,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776044195] [2022-02-15 13:44:02,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:02,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:44:02,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:44:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:44:02,315 INFO L87 Difference]: Start difference. First operand 1290 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:44:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:03,537 INFO L93 Difference]: Finished difference Result 3446 states and 8576 transitions. [2022-02-15 13:44:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:44:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 29 [2022-02-15 13:44:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:03,542 INFO L225 Difference]: With dead ends: 3446 [2022-02-15 13:44:03,542 INFO L226 Difference]: Without dead ends: 3413 [2022-02-15 13:44:03,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2667, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:44:03,543 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 330 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:44:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-02-15 13:44:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 1273. [2022-02-15 13:44:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 2.4449685534591197) internal successors, (3110), 1272 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 3110 transitions. [2022-02-15 13:44:03,564 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 3110 transitions. Word has length 29 [2022-02-15 13:44:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 3110 transitions. [2022-02-15 13:44:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 13:44:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 3110 transitions. [2022-02-15 13:44:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:03,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:03,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:03,582 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 13:44:03,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:03,782 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash 553122373, now seen corresponding path program 72 times [2022-02-15 13:44:03,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:03,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509061895] [2022-02-15 13:44:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:03,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:04,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:04,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509061895] [2022-02-15 13:44:04,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509061895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:04,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126483920] [2022-02-15 13:44:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:44:04,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:04,038 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 13:44:04,050 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 13:44:04,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:44:04,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:04,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:04,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:04,460 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 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-15 13:44:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:04,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:05,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:05,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:05,180 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:44:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:05,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126483920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:05,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:05,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-15 13:44:05,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656444959] [2022-02-15 13:44:05,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:05,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:44:05,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:44:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:44:05,226 INFO L87 Difference]: Start difference. First operand 1273 states and 3110 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 13:44:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:05,847 INFO L93 Difference]: Finished difference Result 1781 states and 4358 transitions. [2022-02-15 13:44:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:44:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 29 [2022-02-15 13:44:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:05,850 INFO L225 Difference]: With dead ends: 1781 [2022-02-15 13:44:05,850 INFO L226 Difference]: Without dead ends: 1771 [2022-02-15 13:44:05,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=2456, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:44:05,852 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:05,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 334 Invalid, 0 Unknown, 401 Unchecked, 0.1s Time] [2022-02-15 13:44:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-02-15 13:44:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1294. [2022-02-15 13:44:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.4447022428460943) internal successors, (3161), 1293 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 3161 transitions. [2022-02-15 13:44:05,866 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 3161 transitions. Word has length 29 [2022-02-15 13:44:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:05,867 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 3161 transitions. [2022-02-15 13:44:05,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 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 13:44:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 3161 transitions. [2022-02-15 13:44:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:05,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:05,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:05,886 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 13:44:06,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:06,084 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 797033099, now seen corresponding path program 73 times [2022-02-15 13:44:06,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:06,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351220922] [2022-02-15 13:44:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:06,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:06,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:06,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351220922] [2022-02-15 13:44:06,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351220922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:06,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822512619] [2022-02-15 13:44:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:44:06,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:06,280 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 13:44:06,281 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 13:44:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:44:06,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:06,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:44:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:06,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:06,715 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:06,716 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:44:06,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:06,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:06,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:06,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822512619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:06,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:06,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:44:06,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860152598] [2022-02-15 13:44:06,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:06,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:06,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:06,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:06,783 INFO L87 Difference]: Start difference. First operand 1294 states and 3161 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 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 13:44:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:08,276 INFO L93 Difference]: Finished difference Result 3155 states and 7701 transitions. [2022-02-15 13:44:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:44:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 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 29 [2022-02-15 13:44:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:08,281 INFO L225 Difference]: With dead ends: 3155 [2022-02-15 13:44:08,281 INFO L226 Difference]: Without dead ends: 3100 [2022-02-15 13:44:08,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:44:08,281 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 376 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:08,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 359 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:44:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-02-15 13:44:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1254. [2022-02-15 13:44:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.4421388667198722) internal successors, (3060), 1253 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3060 transitions. [2022-02-15 13:44:08,300 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3060 transitions. Word has length 29 [2022-02-15 13:44:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:08,301 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3060 transitions. [2022-02-15 13:44:08,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 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 13:44:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3060 transitions. [2022-02-15 13:44:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:08,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:08,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:08,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:08,518 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,SelfDestructingSolverStorable76 [2022-02-15 13:44:08,518 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash -760122651, now seen corresponding path program 74 times [2022-02-15 13:44:08,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:08,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962478538] [2022-02-15 13:44:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:08,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:08,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:08,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962478538] [2022-02-15 13:44:08,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962478538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:08,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340039552] [2022-02-15 13:44:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:44:08,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:08,770 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 13:44:08,771 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 13:44:08,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:44:08,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:08,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:08,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:09,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:44:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:09,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:09,445 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:09,446 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:44:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:09,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:09,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:09,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340039552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:09,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:09,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-15 13:44:09,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940473976] [2022-02-15 13:44:09,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:09,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:09,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:09,552 INFO L87 Difference]: Start difference. First operand 1254 states and 3060 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 13:44:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:10,809 INFO L93 Difference]: Finished difference Result 2678 states and 6587 transitions. [2022-02-15 13:44:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:44:10,809 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 29 [2022-02-15 13:44:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:10,813 INFO L225 Difference]: With dead ends: 2678 [2022-02-15 13:44:10,813 INFO L226 Difference]: Without dead ends: 2665 [2022-02-15 13:44:10,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=2252, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:44:10,814 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:10,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 261 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:44:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-02-15 13:44:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1251. [2022-02-15 13:44:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.4424) internal successors, (3053), 1250 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3053 transitions. [2022-02-15 13:44:10,834 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3053 transitions. Word has length 29 [2022-02-15 13:44:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:10,834 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 3053 transitions. [2022-02-15 13:44:10,834 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 13:44:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3053 transitions. [2022-02-15 13:44:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:10,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:10,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:10,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:11,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-15 13:44:11,052 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 270558087, now seen corresponding path program 75 times [2022-02-15 13:44:11,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:11,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096257927] [2022-02-15 13:44:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:11,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:11,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096257927] [2022-02-15 13:44:11,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096257927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:11,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437937114] [2022-02-15 13:44:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:44:11,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:11,310 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 13:44:11,310 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 13:44:11,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:44:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:11,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 13:44:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:11,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:11,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-02-15 13:44:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:12,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:12,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-02-15 13:44:12,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:44:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:12,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437937114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:12,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:12,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 35 [2022-02-15 13:44:12,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008397174] [2022-02-15 13:44:12,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:12,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:44:12,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:44:12,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:44:12,055 INFO L87 Difference]: Start difference. First operand 1251 states and 3053 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 13:44:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:15,542 INFO L93 Difference]: Finished difference Result 3559 states and 8954 transitions. [2022-02-15 13:44:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 13:44:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 29 [2022-02-15 13:44:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:15,547 INFO L225 Difference]: With dead ends: 3559 [2022-02-15 13:44:15,547 INFO L226 Difference]: Without dead ends: 3548 [2022-02-15 13:44:15,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1408, Invalid=7904, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 13:44:15,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 301 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:15,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 168 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2042 Invalid, 0 Unknown, 593 Unchecked, 0.9s Time] [2022-02-15 13:44:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-02-15 13:44:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 1282. [2022-02-15 13:44:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 2.449648711943794) internal successors, (3138), 1281 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3138 transitions. [2022-02-15 13:44:15,566 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3138 transitions. Word has length 29 [2022-02-15 13:44:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 3138 transitions. [2022-02-15 13:44:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 13:44:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3138 transitions. [2022-02-15 13:44:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 13:44:15,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:15,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:15,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:15,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:15,784 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1146343377, now seen corresponding path program 76 times [2022-02-15 13:44:15,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:15,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597244933] [2022-02-15 13:44:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:15,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:16,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:16,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597244933] [2022-02-15 13:44:16,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597244933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:16,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565513195] [2022-02-15 13:44:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:44:16,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:16,023 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 13:44:16,024 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 13:44:16,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:44:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:44:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:16,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-15 13:44:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:16,412 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:16,413 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:16,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:16,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:16,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:16,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565513195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:16,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:16,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-15 13:44:16,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152929430] [2022-02-15 13:44:16,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:16,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:44:16,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:44:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:44:16,485 INFO L87 Difference]: Start difference. First operand 1282 states and 3138 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 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 13:44:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:18,376 INFO L93 Difference]: Finished difference Result 3481 states and 8703 transitions. [2022-02-15 13:44:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:44:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 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 29 [2022-02-15 13:44:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:18,381 INFO L225 Difference]: With dead ends: 3481 [2022-02-15 13:44:18,382 INFO L226 Difference]: Without dead ends: 3454 [2022-02-15 13:44:18,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=899, Invalid=4213, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:44:18,382 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 458 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:18,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 181 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1448 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2022-02-15 13:44:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2022-02-15 13:44:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 1237. [2022-02-15 13:44:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.4336569579288025) internal successors, (3008), 1236 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 13:44:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3008 transitions. [2022-02-15 13:44:18,402 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3008 transitions. Word has length 29 [2022-02-15 13:44:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 3008 transitions. [2022-02-15 13:44:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 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 13:44:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3008 transitions. [2022-02-15 13:44:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:18,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:18,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:18,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:18,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:18,617 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 570757232, now seen corresponding path program 1 times [2022-02-15 13:44:18,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:18,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273840834] [2022-02-15 13:44:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:18,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:18,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:18,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273840834] [2022-02-15 13:44:18,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273840834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:18,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30631079] [2022-02-15 13:44:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:18,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:18,978 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 13:44:18,979 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 13:44:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:18,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:19,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:19,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:19,498 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:19,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:19,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30631079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:19,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:19,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:19,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092742750] [2022-02-15 13:44:19,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:19,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:19,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:19,566 INFO L87 Difference]: Start difference. First operand 1237 states and 3008 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 13:44:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:20,562 INFO L93 Difference]: Finished difference Result 2724 states and 6678 transitions. [2022-02-15 13:44:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:44:20,562 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 30 [2022-02-15 13:44:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:20,566 INFO L225 Difference]: With dead ends: 2724 [2022-02-15 13:44:20,566 INFO L226 Difference]: Without dead ends: 2714 [2022-02-15 13:44:20,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:44:20,566 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 527 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:20,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 298 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:44:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-02-15 13:44:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1240. [2022-02-15 13:44:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.4317998385794994) internal successors, (3013), 1239 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3013 transitions. [2022-02-15 13:44:20,583 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3013 transitions. Word has length 30 [2022-02-15 13:44:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:20,583 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3013 transitions. [2022-02-15 13:44:20,583 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 13:44:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3013 transitions. [2022-02-15 13:44:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:20,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:20,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:20,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:20,799 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 238679972, now seen corresponding path program 2 times [2022-02-15 13:44:20,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:20,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468552996] [2022-02-15 13:44:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:20,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:21,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:21,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468552996] [2022-02-15 13:44:21,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468552996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:21,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493333287] [2022-02-15 13:44:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:44:21,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:21,117 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 13:44:21,118 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 13:44:21,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:44:21,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:21,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:21,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:21,579 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:21,579 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:21,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:21,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:21,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:21,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493333287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:21,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:21,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:21,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998741015] [2022-02-15 13:44:21,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:21,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:21,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:21,646 INFO L87 Difference]: Start difference. First operand 1240 states and 3013 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:22,813 INFO L93 Difference]: Finished difference Result 2858 states and 7045 transitions. [2022-02-15 13:44:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:44:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:44:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:22,817 INFO L225 Difference]: With dead ends: 2858 [2022-02-15 13:44:22,817 INFO L226 Difference]: Without dead ends: 2847 [2022-02-15 13:44:22,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:44:22,818 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 294 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:22,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 316 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:44:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2022-02-15 13:44:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1271. [2022-02-15 13:44:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 2.437795275590551) internal successors, (3096), 1270 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 3096 transitions. [2022-02-15 13:44:22,848 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 3096 transitions. Word has length 30 [2022-02-15 13:44:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 3096 transitions. [2022-02-15 13:44:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 3096 transitions. [2022-02-15 13:44:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:22,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:22,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:22,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:23,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:23,065 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1995081022, now seen corresponding path program 3 times [2022-02-15 13:44:23,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:23,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226325521] [2022-02-15 13:44:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:23,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:23,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:23,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226325521] [2022-02-15 13:44:23,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226325521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:23,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566247275] [2022-02-15 13:44:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:44:23,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:23,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:23,335 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 13:44:23,335 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 13:44:23,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:44:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:23,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-15 13:44:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:23,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:23,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-15 13:44:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:23,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:24,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:24,410 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2022-02-15 13:44:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:24,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566247275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:24,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:24,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 37 [2022-02-15 13:44:24,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257840644] [2022-02-15 13:44:24,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:24,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:44:24,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:24,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:44:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:44:24,468 INFO L87 Difference]: Start difference. First operand 1271 states and 3096 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:26,160 INFO L93 Difference]: Finished difference Result 2972 states and 7376 transitions. [2022-02-15 13:44:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:44:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:44:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:26,164 INFO L225 Difference]: With dead ends: 2972 [2022-02-15 13:44:26,164 INFO L226 Difference]: Without dead ends: 2959 [2022-02-15 13:44:26,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:44:26,164 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 381 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 932 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:26,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 177 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1425 Invalid, 0 Unknown, 932 Unchecked, 0.7s Time] [2022-02-15 13:44:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-02-15 13:44:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1313. [2022-02-15 13:44:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.4405487804878048) internal successors, (3202), 1312 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3202 transitions. [2022-02-15 13:44:26,181 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3202 transitions. Word has length 30 [2022-02-15 13:44:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:26,181 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 3202 transitions. [2022-02-15 13:44:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3202 transitions. [2022-02-15 13:44:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:26,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:26,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:26,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:26,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:26,399 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1077130832, now seen corresponding path program 4 times [2022-02-15 13:44:26,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:26,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412335841] [2022-02-15 13:44:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:26,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:26,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:26,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412335841] [2022-02-15 13:44:26,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412335841] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:26,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678873914] [2022-02-15 13:44:26,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:44:26,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:26,780 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 13:44:26,781 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 13:44:26,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:44:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:26,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:27,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:27,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:27,438 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:27,438 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:27,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:27,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678873914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:27,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:27,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:27,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219691744] [2022-02-15 13:44:27,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:27,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:27,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:27,539 INFO L87 Difference]: Start difference. First operand 1313 states and 3202 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:29,332 INFO L93 Difference]: Finished difference Result 3362 states and 8300 transitions. [2022-02-15 13:44:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:44:29,332 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:44:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:29,337 INFO L225 Difference]: With dead ends: 3362 [2022-02-15 13:44:29,337 INFO L226 Difference]: Without dead ends: 3340 [2022-02-15 13:44:29,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:44:29,338 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 465 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:29,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 208 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:44:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2022-02-15 13:44:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1263. [2022-02-15 13:44:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.4334389857369256) internal successors, (3071), 1262 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3071 transitions. [2022-02-15 13:44:29,357 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3071 transitions. Word has length 30 [2022-02-15 13:44:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:29,357 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 3071 transitions. [2022-02-15 13:44:29,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3071 transitions. [2022-02-15 13:44:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:29,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:29,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:29,374 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 13:44:29,571 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,SelfDestructingSolverStorable83 [2022-02-15 13:44:29,571 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1764442066, now seen corresponding path program 5 times [2022-02-15 13:44:29,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:29,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789567678] [2022-02-15 13:44:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:29,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:29,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:29,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789567678] [2022-02-15 13:44:29,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789567678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:29,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350066408] [2022-02-15 13:44:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:44:29,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:29,866 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 13:44:29,867 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 13:44:29,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:44:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:29,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:30,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:30,590 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:30,591 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:30,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:30,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:30,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350066408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:30,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:30,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:30,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122540332] [2022-02-15 13:44:30,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:30,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:30,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:30,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:30,686 INFO L87 Difference]: Start difference. First operand 1263 states and 3071 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 13:44:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:32,461 INFO L93 Difference]: Finished difference Result 2775 states and 6780 transitions. [2022-02-15 13:44:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:44:32,462 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 30 [2022-02-15 13:44:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:32,465 INFO L225 Difference]: With dead ends: 2775 [2022-02-15 13:44:32,465 INFO L226 Difference]: Without dead ends: 2755 [2022-02-15 13:44:32,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=2152, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:44:32,466 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 436 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:32,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 296 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:44:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-02-15 13:44:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1261. [2022-02-15 13:44:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.433333333333333) internal successors, (3066), 1260 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3066 transitions. [2022-02-15 13:44:32,481 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3066 transitions. Word has length 30 [2022-02-15 13:44:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:32,481 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3066 transitions. [2022-02-15 13:44:32,481 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 13:44:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3066 transitions. [2022-02-15 13:44:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:32,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:32,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:32,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:32,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:32,683 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:32,683 INFO L85 PathProgramCache]: Analyzing trace with hash 892952774, now seen corresponding path program 6 times [2022-02-15 13:44:32,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:32,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318382065] [2022-02-15 13:44:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:32,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:32,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:32,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318382065] [2022-02-15 13:44:32,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318382065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:32,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778262192] [2022-02-15 13:44:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:44:32,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:32,990 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 13:44:32,991 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 13:44:33,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:44:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:33,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:33,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:33,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:33,648 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:33,648 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:33,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:33,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:33,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778262192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:33,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:33,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:33,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897858499] [2022-02-15 13:44:33,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:33,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:33,749 INFO L87 Difference]: Start difference. First operand 1261 states and 3066 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 13:44:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:35,406 INFO L93 Difference]: Finished difference Result 2850 states and 6955 transitions. [2022-02-15 13:44:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:44:35,407 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 30 [2022-02-15 13:44:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:35,410 INFO L225 Difference]: With dead ends: 2850 [2022-02-15 13:44:35,410 INFO L226 Difference]: Without dead ends: 2813 [2022-02-15 13:44:35,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=1990, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:44:35,410 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 450 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:35,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 329 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:44:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-15 13:44:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1255. [2022-02-15 13:44:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 2.4330143540669855) internal successors, (3051), 1254 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3051 transitions. [2022-02-15 13:44:35,427 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3051 transitions. Word has length 30 [2022-02-15 13:44:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:35,428 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3051 transitions. [2022-02-15 13:44:35,428 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 13:44:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3051 transitions. [2022-02-15 13:44:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:35,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:35,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:35,447 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 13:44:35,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:35,645 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -740451580, now seen corresponding path program 7 times [2022-02-15 13:44:35,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:35,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875435043] [2022-02-15 13:44:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:35,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:35,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:35,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875435043] [2022-02-15 13:44:35,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875435043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:35,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247606139] [2022-02-15 13:44:35,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:44:35,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:35,964 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 13:44:35,965 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 13:44:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:35,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:36,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:44:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:36,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:36,604 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:36,605 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:36,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:36,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247606139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:36,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:36,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:36,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691868380] [2022-02-15 13:44:36,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:36,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:36,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:36,710 INFO L87 Difference]: Start difference. First operand 1255 states and 3051 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 13:44:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:38,090 INFO L93 Difference]: Finished difference Result 2689 states and 6599 transitions. [2022-02-15 13:44:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:44:38,091 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 30 [2022-02-15 13:44:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:38,094 INFO L225 Difference]: With dead ends: 2689 [2022-02-15 13:44:38,094 INFO L226 Difference]: Without dead ends: 2679 [2022-02-15 13:44:38,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:44:38,095 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 411 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:38,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 291 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:44:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2022-02-15 13:44:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1255. [2022-02-15 13:44:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 2.4330143540669855) internal successors, (3051), 1254 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3051 transitions. [2022-02-15 13:44:38,111 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3051 transitions. Word has length 30 [2022-02-15 13:44:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:38,111 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3051 transitions. [2022-02-15 13:44:38,111 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 13:44:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3051 transitions. [2022-02-15 13:44:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:38,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:38,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:38,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:38,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:38,313 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1900961628, now seen corresponding path program 8 times [2022-02-15 13:44:38,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:38,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496214584] [2022-02-15 13:44:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:38,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:38,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:38,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496214584] [2022-02-15 13:44:38,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496214584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:38,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162268413] [2022-02-15 13:44:38,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:44:38,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:38,620 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 13:44:38,621 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 13:44:38,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:44:38,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:38,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:39,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:44:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:39,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:39,337 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:39,337 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:39,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:39,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162268413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:39,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:39,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:44:39,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866226446] [2022-02-15 13:44:39,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:39,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:39,430 INFO L87 Difference]: Start difference. First operand 1255 states and 3051 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:41,354 INFO L93 Difference]: Finished difference Result 2940 states and 7257 transitions. [2022-02-15 13:44:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:44:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:44:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:41,358 INFO L225 Difference]: With dead ends: 2940 [2022-02-15 13:44:41,358 INFO L226 Difference]: Without dead ends: 2929 [2022-02-15 13:44:41,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=430, Invalid=3730, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:44:41,359 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 404 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:41,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 284 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:44:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2022-02-15 13:44:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1292. [2022-02-15 13:44:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.436870642912471) internal successors, (3146), 1291 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3146 transitions. [2022-02-15 13:44:41,376 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3146 transitions. Word has length 30 [2022-02-15 13:44:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:41,376 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3146 transitions. [2022-02-15 13:44:41,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3146 transitions. [2022-02-15 13:44:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:41,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:41,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:41,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:41,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:41,591 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1773518532, now seen corresponding path program 9 times [2022-02-15 13:44:41,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:41,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171579311] [2022-02-15 13:44:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:41,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:41,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:41,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171579311] [2022-02-15 13:44:41,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171579311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:41,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242879564] [2022-02-15 13:44:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:44:41,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:41,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:41,846 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 13:44:41,847 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 13:44:41,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:44:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:41,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:42,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:44:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:42,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:42,384 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:42,384 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:42,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:42,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:42,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:42,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242879564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:42,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:42,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:44:42,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483852894] [2022-02-15 13:44:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:42,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:44:42,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:44:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:44:42,449 INFO L87 Difference]: Start difference. First operand 1292 states and 3146 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:44,166 INFO L93 Difference]: Finished difference Result 3169 states and 7883 transitions. [2022-02-15 13:44:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:44:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:44:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:44,170 INFO L225 Difference]: With dead ends: 3169 [2022-02-15 13:44:44,170 INFO L226 Difference]: Without dead ends: 3150 [2022-02-15 13:44:44,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=5070, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:44:44,171 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 512 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:44,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 216 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:44:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-02-15 13:44:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 1296. [2022-02-15 13:44:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.44015444015444) internal successors, (3160), 1295 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 3160 transitions. [2022-02-15 13:44:44,192 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 3160 transitions. Word has length 30 [2022-02-15 13:44:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:44,192 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 3160 transitions. [2022-02-15 13:44:44,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 3160 transitions. [2022-02-15 13:44:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:44,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:44,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:44,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-15 13:44:44,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:44,407 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1856245596, now seen corresponding path program 10 times [2022-02-15 13:44:44,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:44,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15428594] [2022-02-15 13:44:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:44,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:44,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:44,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15428594] [2022-02-15 13:44:44,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15428594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:44,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387891369] [2022-02-15 13:44:44,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:44:44,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:44,680 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 13:44:44,681 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 13:44:44,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:44:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:44,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:45,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:44:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:45,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:45,320 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:45,320 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:45,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:45,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:45,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387891369] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:45,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:45,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:44:45,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974884029] [2022-02-15 13:44:45,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:45,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:44:45,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:44:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:44:45,409 INFO L87 Difference]: Start difference. First operand 1296 states and 3160 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:47,904 INFO L93 Difference]: Finished difference Result 3314 states and 8287 transitions. [2022-02-15 13:44:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:44:47,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:44:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:47,909 INFO L225 Difference]: With dead ends: 3314 [2022-02-15 13:44:47,909 INFO L226 Difference]: Without dead ends: 3286 [2022-02-15 13:44:47,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=603, Invalid=4653, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:44:47,910 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 356 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:47,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 231 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:44:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-02-15 13:44:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1283. [2022-02-15 13:44:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.432917316692668) internal successors, (3119), 1282 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3119 transitions. [2022-02-15 13:44:47,931 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3119 transitions. Word has length 30 [2022-02-15 13:44:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:47,931 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3119 transitions. [2022-02-15 13:44:47,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3119 transitions. [2022-02-15 13:44:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:47,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:47,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:47,948 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 13:44:48,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-15 13:44:48,143 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1433916058, now seen corresponding path program 11 times [2022-02-15 13:44:48,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:48,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124527356] [2022-02-15 13:44:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:48,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:48,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:48,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124527356] [2022-02-15 13:44:48,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124527356] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:48,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404313715] [2022-02-15 13:44:48,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:44:48,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:48,473 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 13:44:48,475 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 13:44:48,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:44:48,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:48,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:48,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:44:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:48,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:49,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:49,111 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:49,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:49,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:49,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:44:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:49,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404313715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:49,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:49,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:49,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384773501] [2022-02-15 13:44:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:49,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:49,214 INFO L87 Difference]: Start difference. First operand 1283 states and 3119 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:51,005 INFO L93 Difference]: Finished difference Result 2936 states and 7248 transitions. [2022-02-15 13:44:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:44:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:44:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:51,009 INFO L225 Difference]: With dead ends: 2936 [2022-02-15 13:44:51,009 INFO L226 Difference]: Without dead ends: 2921 [2022-02-15 13:44:51,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=588, Invalid=4104, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:44:51,010 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 504 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:51,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 228 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:44:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2022-02-15 13:44:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1299. [2022-02-15 13:44:51,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.4352850539291215) internal successors, (3161), 1298 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3161 transitions. [2022-02-15 13:44:51,028 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3161 transitions. Word has length 30 [2022-02-15 13:44:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:51,028 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3161 transitions. [2022-02-15 13:44:51,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:44:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3161 transitions. [2022-02-15 13:44:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:51,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:51,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:51,046 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 13:44:51,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:51,246 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:51,246 INFO L85 PathProgramCache]: Analyzing trace with hash 322484992, now seen corresponding path program 12 times [2022-02-15 13:44:51,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:51,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342792250] [2022-02-15 13:44:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:51,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:51,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:51,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342792250] [2022-02-15 13:44:51,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342792250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:51,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682950455] [2022-02-15 13:44:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:44:51,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:51,564 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 13:44:51,564 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 13:44:51,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:44:51,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:44:51,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:44:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:51,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:51,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-15 13:44:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:52,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:52,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:52,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:52,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:44:52,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:44:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:52,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682950455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:52,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:52,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-15 13:44:52,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521800627] [2022-02-15 13:44:52,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:52,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:44:52,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:44:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:44:52,783 INFO L87 Difference]: Start difference. First operand 1299 states and 3161 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:44:58,072 INFO L93 Difference]: Finished difference Result 3343 states and 8375 transitions. [2022-02-15 13:44:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:44:58,072 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:44:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:44:58,076 INFO L225 Difference]: With dead ends: 3343 [2022-02-15 13:44:58,076 INFO L226 Difference]: Without dead ends: 3331 [2022-02-15 13:44:58,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4237 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1707, Invalid=10283, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 13:44:58,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 628 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2307 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:44:58,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 158 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1654 Invalid, 0 Unknown, 2307 Unchecked, 0.8s Time] [2022-02-15 13:44:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-02-15 13:44:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 1483. [2022-02-15 13:44:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.4635627530364372) internal successors, (3651), 1482 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3651 transitions. [2022-02-15 13:44:58,097 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3651 transitions. Word has length 30 [2022-02-15 13:44:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:44:58,097 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 3651 transitions. [2022-02-15 13:44:58,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:44:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3651 transitions. [2022-02-15 13:44:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:44:58,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:44:58,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:44:58,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-15 13:44:58,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:58,315 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:44:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:44:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash -595465198, now seen corresponding path program 13 times [2022-02-15 13:44:58,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:44:58,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594060965] [2022-02-15 13:44:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:44:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:44:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:58,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:44:58,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594060965] [2022-02-15 13:44:58,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594060965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:44:58,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315730668] [2022-02-15 13:44:58,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:44:58,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:44:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:44:58,540 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 13:44:58,541 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 13:44:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:44:58,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:44:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:44:58,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:44:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:44:58,982 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:44:58,982 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:44:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:44:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:44:59,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:44:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:44:59,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315730668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:44:59,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:44:59,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:44:59,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723172468] [2022-02-15 13:44:59,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:44:59,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:44:59,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:44:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:44:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:44:59,047 INFO L87 Difference]: Start difference. First operand 1483 states and 3651 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:01,286 INFO L93 Difference]: Finished difference Result 3607 states and 8924 transitions. [2022-02-15 13:45:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:45:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:45:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:01,291 INFO L225 Difference]: With dead ends: 3607 [2022-02-15 13:45:01,291 INFO L226 Difference]: Without dead ends: 3579 [2022-02-15 13:45:01,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=996, Invalid=6836, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:45:01,292 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 540 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:01,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 148 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:45:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2022-02-15 13:45:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 1418. [2022-02-15 13:45:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.455892731122089) internal successors, (3480), 1417 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 3480 transitions. [2022-02-15 13:45:01,312 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 3480 transitions. Word has length 30 [2022-02-15 13:45:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:01,313 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 3480 transitions. [2022-02-15 13:45:01,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 3480 transitions. [2022-02-15 13:45:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:01,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:01,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:01,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:01,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:01,530 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash 857929200, now seen corresponding path program 14 times [2022-02-15 13:45:01,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:01,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76982893] [2022-02-15 13:45:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:01,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:01,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:01,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76982893] [2022-02-15 13:45:01,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76982893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:01,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940457149] [2022-02-15 13:45:01,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:45:01,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:01,755 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 13:45:01,755 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 13:45:01,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:45:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:01,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:45:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:02,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:02,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-15 13:45:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:02,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:02,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:02,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:02,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:02,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:45:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:02,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940457149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:02,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:02,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-02-15 13:45:02,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634786105] [2022-02-15 13:45:02,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:02,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:45:02,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:45:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:45:02,618 INFO L87 Difference]: Start difference. First operand 1418 states and 3480 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 13:45:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:05,995 INFO L93 Difference]: Finished difference Result 3142 states and 7746 transitions. [2022-02-15 13:45:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 13:45:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 30 [2022-02-15 13:45:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:06,000 INFO L225 Difference]: With dead ends: 3142 [2022-02-15 13:45:06,000 INFO L226 Difference]: Without dead ends: 3109 [2022-02-15 13:45:06,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1221, Invalid=7709, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 13:45:06,001 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 425 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1906 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:06,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 206 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1731 Invalid, 0 Unknown, 1906 Unchecked, 0.6s Time] [2022-02-15 13:45:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-02-15 13:45:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1569. [2022-02-15 13:45:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.4846938775510203) internal successors, (3896), 1568 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 3896 transitions. [2022-02-15 13:45:06,033 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 3896 transitions. Word has length 30 [2022-02-15 13:45:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 3896 transitions. [2022-02-15 13:45:06,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 13:45:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 3896 transitions. [2022-02-15 13:45:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:06,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:06,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:06,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:06,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:06,252 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash -406049408, now seen corresponding path program 15 times [2022-02-15 13:45:06,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:06,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073830788] [2022-02-15 13:45:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:06,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:06,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:06,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073830788] [2022-02-15 13:45:06,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073830788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:06,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018772459] [2022-02-15 13:45:06,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:45:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:06,457 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 13:45:06,458 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 13:45:06,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:45:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:06,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:45:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:06,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:06,720 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 3 case distinctions, treesize of input 24 treesize of output 40 [2022-02-15 13:45:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:06,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:07,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:07,381 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:45:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:07,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018772459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:07,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:07,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-15 13:45:07,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70634371] [2022-02-15 13:45:07,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:07,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 13:45:07,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 13:45:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:45:07,416 INFO L87 Difference]: Start difference. First operand 1569 states and 3896 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 13:45:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:11,278 INFO L93 Difference]: Finished difference Result 3735 states and 9323 transitions. [2022-02-15 13:45:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:45:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 30 [2022-02-15 13:45:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:11,284 INFO L225 Difference]: With dead ends: 3735 [2022-02-15 13:45:11,284 INFO L226 Difference]: Without dead ends: 3724 [2022-02-15 13:45:11,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1640, Invalid=8662, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 13:45:11,285 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 726 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1261 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:11,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 163 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1537 Invalid, 0 Unknown, 1261 Unchecked, 0.9s Time] [2022-02-15 13:45:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2022-02-15 13:45:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 1584. [2022-02-15 13:45:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4857864813644976) internal successors, (3935), 1583 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3935 transitions. [2022-02-15 13:45:11,308 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3935 transitions. Word has length 30 [2022-02-15 13:45:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 3935 transitions. [2022-02-15 13:45:11,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 13:45:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3935 transitions. [2022-02-15 13:45:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:11,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:11,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:11,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:11,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:11,526 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1350351642, now seen corresponding path program 16 times [2022-02-15 13:45:11,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:11,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861959646] [2022-02-15 13:45:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:11,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:11,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:11,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861959646] [2022-02-15 13:45:11,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861959646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:11,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484254616] [2022-02-15 13:45:11,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:45:11,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:11,778 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 13:45:11,779 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 13:45:11,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:45:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:11,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:12,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:12,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:12,325 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:12,325 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:12,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:12,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:12,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484254616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:12,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:12,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:45:12,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922014049] [2022-02-15 13:45:12,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:12,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:45:12,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:12,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:45:12,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:45:12,406 INFO L87 Difference]: Start difference. First operand 1584 states and 3935 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:14,792 INFO L93 Difference]: Finished difference Result 3551 states and 8901 transitions. [2022-02-15 13:45:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:45:14,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:45:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:14,798 INFO L225 Difference]: With dead ends: 3551 [2022-02-15 13:45:14,798 INFO L226 Difference]: Without dead ends: 3531 [2022-02-15 13:45:14,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=628, Invalid=3532, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:45:14,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 425 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:14,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 217 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:45:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2022-02-15 13:45:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 1587. [2022-02-15 13:45:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.4836065573770494) internal successors, (3939), 1586 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3939 transitions. [2022-02-15 13:45:14,821 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3939 transitions. Word has length 30 [2022-02-15 13:45:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 3939 transitions. [2022-02-15 13:45:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3939 transitions. [2022-02-15 13:45:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:14,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:14,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:14,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:15,039 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,SelfDestructingSolverStorable95 [2022-02-15 13:45:15,040 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1885795850, now seen corresponding path program 17 times [2022-02-15 13:45:15,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:15,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940077598] [2022-02-15 13:45:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:15,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:15,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:15,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940077598] [2022-02-15 13:45:15,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940077598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:15,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804872310] [2022-02-15 13:45:15,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:45:15,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:15,347 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 13:45:15,348 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 13:45:15,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:45:15,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:15,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:15,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:15,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:15,876 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:15,876 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:15,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:15,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:15,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804872310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:15,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:15,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:15,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685639550] [2022-02-15 13:45:15,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:15,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:15,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:15,941 INFO L87 Difference]: Start difference. First operand 1587 states and 3939 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 13:45:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:17,563 INFO L93 Difference]: Finished difference Result 3077 states and 7623 transitions. [2022-02-15 13:45:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:45:17,563 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 30 [2022-02-15 13:45:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:17,567 INFO L225 Difference]: With dead ends: 3077 [2022-02-15 13:45:17,567 INFO L226 Difference]: Without dead ends: 3051 [2022-02-15 13:45:17,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=530, Invalid=3376, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:45:17,567 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 581 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:17,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 208 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:45:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-02-15 13:45:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1587. [2022-02-15 13:45:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.48234552332913) internal successors, (3937), 1586 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3937 transitions. [2022-02-15 13:45:17,589 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3937 transitions. Word has length 30 [2022-02-15 13:45:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:17,589 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 3937 transitions. [2022-02-15 13:45:17,589 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 13:45:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3937 transitions. [2022-02-15 13:45:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:17,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:17,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:17,607 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 13:45:17,802 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,SelfDestructingSolverStorable96 [2022-02-15 13:45:17,802 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2004425308, now seen corresponding path program 18 times [2022-02-15 13:45:17,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:17,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672365165] [2022-02-15 13:45:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:17,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:18,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:18,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672365165] [2022-02-15 13:45:18,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672365165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:18,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376313045] [2022-02-15 13:45:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:45:18,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:18,034 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 13:45:18,035 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 13:45:18,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:45:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:18,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:18,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:18,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:18,655 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:18,656 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:18,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:18,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376313045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:18,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:18,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:18,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543550733] [2022-02-15 13:45:18,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:18,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:18,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:18,721 INFO L87 Difference]: Start difference. First operand 1587 states and 3937 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 13:45:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:20,705 INFO L93 Difference]: Finished difference Result 3144 states and 7787 transitions. [2022-02-15 13:45:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:45:20,705 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 30 [2022-02-15 13:45:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:20,710 INFO L225 Difference]: With dead ends: 3144 [2022-02-15 13:45:20,710 INFO L226 Difference]: Without dead ends: 3086 [2022-02-15 13:45:20,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=510, Invalid=3272, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:45:20,710 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 535 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:20,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 271 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:45:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2022-02-15 13:45:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 1583. [2022-02-15 13:45:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.4804045512010116) internal successors, (3924), 1582 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 3924 transitions. [2022-02-15 13:45:20,732 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 3924 transitions. Word has length 30 [2022-02-15 13:45:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:20,732 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 3924 transitions. [2022-02-15 13:45:20,732 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 13:45:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 3924 transitions. [2022-02-15 13:45:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:20,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:20,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:20,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:20,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:20,947 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294352, now seen corresponding path program 19 times [2022-02-15 13:45:20,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:20,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34235505] [2022-02-15 13:45:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:20,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:21,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:21,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34235505] [2022-02-15 13:45:21,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34235505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:21,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661012440] [2022-02-15 13:45:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:45:21,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:21,275 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 13:45:21,275 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 13:45:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:21,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:21,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:21,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:21,722 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:21,722 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:21,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:21,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:21,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:45:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:21,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661012440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:21,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:21,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:21,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367236343] [2022-02-15 13:45:21,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:21,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:21,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:21,784 INFO L87 Difference]: Start difference. First operand 1583 states and 3924 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:45:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:23,850 INFO L93 Difference]: Finished difference Result 3395 states and 8465 transitions. [2022-02-15 13:45:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:45:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:45:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:23,855 INFO L225 Difference]: With dead ends: 3395 [2022-02-15 13:45:23,855 INFO L226 Difference]: Without dead ends: 3360 [2022-02-15 13:45:23,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=560, Invalid=3600, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:45:23,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 464 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:23,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 237 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:45:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-02-15 13:45:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 1569. [2022-02-15 13:45:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.482142857142857) internal successors, (3892), 1568 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 3892 transitions. [2022-02-15 13:45:23,877 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 3892 transitions. Word has length 30 [2022-02-15 13:45:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 3892 transitions. [2022-02-15 13:45:23,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:45:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 3892 transitions. [2022-02-15 13:45:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:23,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:23,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:23,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:24,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:24,083 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1275517680, now seen corresponding path program 20 times [2022-02-15 13:45:24,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:24,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12126267] [2022-02-15 13:45:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:24,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:24,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:24,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12126267] [2022-02-15 13:45:24,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12126267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:24,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711338821] [2022-02-15 13:45:24,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:45:24,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:24,370 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 13:45:24,371 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 13:45:24,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:45:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:24,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:45:24,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:24,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:24,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-15 13:45:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:25,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:25,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:45:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:25,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711338821] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:25,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:25,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-02-15 13:45:25,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541122496] [2022-02-15 13:45:25,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:25,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:45:25,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:45:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:45:25,221 INFO L87 Difference]: Start difference. First operand 1569 states and 3892 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 13:45:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:27,439 INFO L93 Difference]: Finished difference Result 3322 states and 8330 transitions. [2022-02-15 13:45:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:45:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 30 [2022-02-15 13:45:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:27,444 INFO L225 Difference]: With dead ends: 3322 [2022-02-15 13:45:27,444 INFO L226 Difference]: Without dead ends: 3307 [2022-02-15 13:45:27,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1010, Invalid=5796, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:45:27,445 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 428 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1757 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:27,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 231 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1759 Invalid, 0 Unknown, 1757 Unchecked, 0.6s Time] [2022-02-15 13:45:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2022-02-15 13:45:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 1679. [2022-02-15 13:45:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.498212157330155) internal successors, (4192), 1678 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4192 transitions. [2022-02-15 13:45:27,467 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4192 transitions. Word has length 30 [2022-02-15 13:45:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:27,467 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 4192 transitions. [2022-02-15 13:45:27,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 13:45:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4192 transitions. [2022-02-15 13:45:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:27,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:27,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:27,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:27,684 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,SelfDestructingSolverStorable99 [2022-02-15 13:45:27,685 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash 480883370, now seen corresponding path program 21 times [2022-02-15 13:45:27,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:27,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954042994] [2022-02-15 13:45:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:27,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:27,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:27,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954042994] [2022-02-15 13:45:27,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954042994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:27,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282216475] [2022-02-15 13:45:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:45:27,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:27,906 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 13:45:27,907 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 13:45:27,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:45:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:27,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:28,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:45:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:28,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:28,389 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:28,389 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:28,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:28,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:28,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282216475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:28,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:28,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:45:28,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652886248] [2022-02-15 13:45:28,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:45:28,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:28,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:45:28,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:45:28,463 INFO L87 Difference]: Start difference. First operand 1679 states and 4192 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:30,499 INFO L93 Difference]: Finished difference Result 4016 states and 10111 transitions. [2022-02-15 13:45:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:45:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:45:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:30,505 INFO L225 Difference]: With dead ends: 4016 [2022-02-15 13:45:30,505 INFO L226 Difference]: Without dead ends: 3989 [2022-02-15 13:45:30,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=633, Invalid=4197, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:45:30,505 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 468 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:30,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 316 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:45:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2022-02-15 13:45:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 1718. [2022-02-15 13:45:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.498543972044263) internal successors, (4290), 1717 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 4290 transitions. [2022-02-15 13:45:30,530 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 4290 transitions. Word has length 30 [2022-02-15 13:45:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:30,530 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 4290 transitions. [2022-02-15 13:45:30,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 4290 transitions. [2022-02-15 13:45:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:30,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:30,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:30,548 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 13:45:30,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:30,747 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1016327578, now seen corresponding path program 22 times [2022-02-15 13:45:30,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:30,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101799949] [2022-02-15 13:45:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:31,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:31,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101799949] [2022-02-15 13:45:31,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101799949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:31,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387553667] [2022-02-15 13:45:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:45:31,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:31,035 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 13:45:31,035 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 13:45:31,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:45:31,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:31,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:31,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:31,720 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:31,720 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:31,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:31,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:31,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387553667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:31,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:31,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:31,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153429561] [2022-02-15 13:45:31,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:31,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:31,836 INFO L87 Difference]: Start difference. First operand 1718 states and 4290 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 13:45:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:33,908 INFO L93 Difference]: Finished difference Result 3433 states and 8503 transitions. [2022-02-15 13:45:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:45:33,908 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 30 [2022-02-15 13:45:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:33,912 INFO L225 Difference]: With dead ends: 3433 [2022-02-15 13:45:33,912 INFO L226 Difference]: Without dead ends: 3406 [2022-02-15 13:45:33,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=515, Invalid=3517, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:45:33,913 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 404 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:33,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 325 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:45:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2022-02-15 13:45:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 1726. [2022-02-15 13:45:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.497391304347826) internal successors, (4308), 1725 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 4308 transitions. [2022-02-15 13:45:33,934 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 4308 transitions. Word has length 30 [2022-02-15 13:45:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:33,934 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 4308 transitions. [2022-02-15 13:45:33,934 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 13:45:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 4308 transitions. [2022-02-15 13:45:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:33,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:33,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:33,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:34,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:34,152 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash -621244878, now seen corresponding path program 23 times [2022-02-15 13:45:34,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:34,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21625077] [2022-02-15 13:45:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:34,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:34,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:34,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21625077] [2022-02-15 13:45:34,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21625077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:34,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456060772] [2022-02-15 13:45:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:45:34,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:34,436 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 13:45:34,437 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 13:45:34,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:45:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:34,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:34,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:45:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:35,009 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:35,010 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:35,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:35,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:35,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:35,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456060772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:35,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:35,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:35,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122798979] [2022-02-15 13:45:35,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:35,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:35,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:35,081 INFO L87 Difference]: Start difference. First operand 1726 states and 4308 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 13:45:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:37,157 INFO L93 Difference]: Finished difference Result 3571 states and 8829 transitions. [2022-02-15 13:45:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:45:37,158 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 30 [2022-02-15 13:45:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:37,177 INFO L225 Difference]: With dead ends: 3571 [2022-02-15 13:45:37,177 INFO L226 Difference]: Without dead ends: 3516 [2022-02-15 13:45:37,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=476, Invalid=3184, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:45:37,177 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 498 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:37,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 329 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:45:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2022-02-15 13:45:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 1723. [2022-02-15 13:45:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.494773519163763) internal successors, (4296), 1722 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 4296 transitions. [2022-02-15 13:45:37,198 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 4296 transitions. Word has length 30 [2022-02-15 13:45:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 4296 transitions. [2022-02-15 13:45:37,198 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 13:45:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 4296 transitions. [2022-02-15 13:45:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:37,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:37,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:37,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-15 13:45:37,416 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2040318064, now seen corresponding path program 24 times [2022-02-15 13:45:37,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:37,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407031271] [2022-02-15 13:45:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:37,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:37,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:37,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407031271] [2022-02-15 13:45:37,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407031271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:37,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169492465] [2022-02-15 13:45:37,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:45:37,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:37,712 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 13:45:37,713 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 13:45:37,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:45:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:37,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:45:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:38,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:38,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 37 [2022-02-15 13:45:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:38,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:38,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:38,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:38,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:45:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:39,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169492465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:39,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:39,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-02-15 13:45:39,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810721264] [2022-02-15 13:45:39,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:39,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:45:39,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:45:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:45:39,005 INFO L87 Difference]: Start difference. First operand 1723 states and 4296 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 13:45:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:40,446 INFO L93 Difference]: Finished difference Result 2964 states and 7382 transitions. [2022-02-15 13:45:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:45:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 30 [2022-02-15 13:45:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:40,450 INFO L225 Difference]: With dead ends: 2964 [2022-02-15 13:45:40,450 INFO L226 Difference]: Without dead ends: 2951 [2022-02-15 13:45:40,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=606, Invalid=2934, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:45:40,450 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 213 Invalid, 2618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 968 Invalid, 0 Unknown, 1527 Unchecked, 0.4s Time] [2022-02-15 13:45:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-02-15 13:45:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1741. [2022-02-15 13:45:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.4936781609195404) internal successors, (4339), 1740 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4339 transitions. [2022-02-15 13:45:40,470 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4339 transitions. Word has length 30 [2022-02-15 13:45:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:40,470 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 4339 transitions. [2022-02-15 13:45:40,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 13:45:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4339 transitions. [2022-02-15 13:45:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:40,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:40,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:40,490 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 13:45:40,688 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,SelfDestructingSolverStorable103 [2022-02-15 13:45:40,688 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1463983528, now seen corresponding path program 25 times [2022-02-15 13:45:40,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:40,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844585996] [2022-02-15 13:45:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:40,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:41,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:41,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844585996] [2022-02-15 13:45:41,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844585996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:41,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265246838] [2022-02-15 13:45:41,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:45:41,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:41,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:41,020 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 13:45:41,021 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 13:45:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:41,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:41,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:41,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:41,705 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:41,705 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:41,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:41,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:41,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:45:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:41,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265246838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:41,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:41,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:41,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439490005] [2022-02-15 13:45:41,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:41,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:41,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:41,801 INFO L87 Difference]: Start difference. First operand 1741 states and 4339 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:45:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:43,663 INFO L93 Difference]: Finished difference Result 3877 states and 9722 transitions. [2022-02-15 13:45:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:45:43,664 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:45:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:43,679 INFO L225 Difference]: With dead ends: 3877 [2022-02-15 13:45:43,679 INFO L226 Difference]: Without dead ends: 3846 [2022-02-15 13:45:43,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=552, Invalid=3738, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:45:43,680 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 432 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:43,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 307 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:45:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2022-02-15 13:45:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 1723. [2022-02-15 13:45:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.491869918699187) internal successors, (4291), 1722 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 4291 transitions. [2022-02-15 13:45:43,705 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 4291 transitions. Word has length 30 [2022-02-15 13:45:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:43,705 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 4291 transitions. [2022-02-15 13:45:43,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:45:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 4291 transitions. [2022-02-15 13:45:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:43,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:43,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:43,723 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 13:45:43,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:43,915 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 797633524, now seen corresponding path program 1 times [2022-02-15 13:45:43,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:43,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825951137] [2022-02-15 13:45:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:43,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:44,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:44,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825951137] [2022-02-15 13:45:44,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825951137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:44,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279642809] [2022-02-15 13:45:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:44,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:44,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:44,164 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 13:45:44,165 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 13:45:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:44,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:44,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:45:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:44,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:44,644 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:44,644 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:45:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:44,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:44,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279642809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:44,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:44,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:45:44,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856561447] [2022-02-15 13:45:44,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:44,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:45:44,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:45:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:45:44,713 INFO L87 Difference]: Start difference. First operand 1723 states and 4291 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 13:45:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:45,957 INFO L93 Difference]: Finished difference Result 3562 states and 8845 transitions. [2022-02-15 13:45:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:45:45,957 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 30 [2022-02-15 13:45:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:45,963 INFO L225 Difference]: With dead ends: 3562 [2022-02-15 13:45:45,963 INFO L226 Difference]: Without dead ends: 3552 [2022-02-15 13:45:45,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=2125, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:45:45,963 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 471 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:45,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 392 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:45:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2022-02-15 13:45:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1761. [2022-02-15 13:45:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.484659090909091) internal successors, (4373), 1760 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4373 transitions. [2022-02-15 13:45:45,991 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4373 transitions. Word has length 30 [2022-02-15 13:45:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4373 transitions. [2022-02-15 13:45:45,991 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 13:45:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4373 transitions. [2022-02-15 13:45:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:45,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:45,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:46,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:46,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:46,202 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash 220952366, now seen corresponding path program 2 times [2022-02-15 13:45:46,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:46,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054677382] [2022-02-15 13:45:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:46,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:46,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:46,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054677382] [2022-02-15 13:45:46,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054677382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:46,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922792916] [2022-02-15 13:45:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:45:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:46,522 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 13:45:46,525 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 13:45:46,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:45:46,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:46,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:46,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:45:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:46,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:47,189 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:47,189 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:45:47,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:47,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:47,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:47,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922792916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:47,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:47,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:45:47,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649857693] [2022-02-15 13:45:47,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:47,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:45:47,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:47,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:45:47,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:45:47,296 INFO L87 Difference]: Start difference. First operand 1761 states and 4373 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:49,022 INFO L93 Difference]: Finished difference Result 3597 states and 8974 transitions. [2022-02-15 13:45:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:45:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:45:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:49,027 INFO L225 Difference]: With dead ends: 3597 [2022-02-15 13:45:49,027 INFO L226 Difference]: Without dead ends: 3586 [2022-02-15 13:45:49,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:45:49,028 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 380 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:49,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 230 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:45:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-02-15 13:45:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1785. [2022-02-15 13:45:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.4887892376681613) internal successors, (4440), 1784 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 4440 transitions. [2022-02-15 13:45:49,054 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 4440 transitions. Word has length 30 [2022-02-15 13:45:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:49,054 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 4440 transitions. [2022-02-15 13:45:49,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 4440 transitions. [2022-02-15 13:45:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:49,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:49,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:49,086 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 13:45:49,269 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,SelfDestructingSolverStorable106 [2022-02-15 13:45:49,269 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1977353416, now seen corresponding path program 3 times [2022-02-15 13:45:49,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:49,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198021284] [2022-02-15 13:45:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:49,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:49,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:49,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198021284] [2022-02-15 13:45:49,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198021284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:49,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171673469] [2022-02-15 13:45:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:45:49,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:49,485 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 13:45:49,485 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 13:45:49,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:45:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:49,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:45:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:49,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:49,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:45:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:49,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:50,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:45:50,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-15 13:45:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:50,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171673469] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:50,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:50,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2022-02-15 13:45:50,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725013809] [2022-02-15 13:45:50,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:50,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:45:50,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:45:50,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:45:50,590 INFO L87 Difference]: Start difference. First operand 1785 states and 4440 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 13:45:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:52,164 INFO L93 Difference]: Finished difference Result 3139 states and 7873 transitions. [2022-02-15 13:45:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:45:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 30 [2022-02-15 13:45:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:52,169 INFO L225 Difference]: With dead ends: 3139 [2022-02-15 13:45:52,169 INFO L226 Difference]: Without dead ends: 3132 [2022-02-15 13:45:52,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=573, Invalid=4257, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:45:52,169 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 366 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2018 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:52,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 236 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1008 Invalid, 0 Unknown, 2018 Unchecked, 0.4s Time] [2022-02-15 13:45:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2022-02-15 13:45:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1865. [2022-02-15 13:45:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.491952789699571) internal successors, (4645), 1864 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4645 transitions. [2022-02-15 13:45:52,191 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4645 transitions. Word has length 30 [2022-02-15 13:45:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:52,191 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 4645 transitions. [2022-02-15 13:45:52,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 13:45:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4645 transitions. [2022-02-15 13:45:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:52,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:52,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:52,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:52,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-15 13:45:52,409 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash 266455112, now seen corresponding path program 4 times [2022-02-15 13:45:52,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:52,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633110794] [2022-02-15 13:45:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:52,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:52,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:52,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633110794] [2022-02-15 13:45:52,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633110794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:52,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470259881] [2022-02-15 13:45:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:45:52,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:52,666 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 13:45:52,667 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 13:45:52,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:45:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:52,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:52,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:45:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:52,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:53,226 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:53,226 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:45:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:53,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:53,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470259881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:53,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:53,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:45:53,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495684782] [2022-02-15 13:45:53,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:53,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:45:53,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:45:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:45:53,306 INFO L87 Difference]: Start difference. First operand 1865 states and 4645 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 13:45:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:54,912 INFO L93 Difference]: Finished difference Result 4143 states and 10367 transitions. [2022-02-15 13:45:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:45:54,912 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 30 [2022-02-15 13:45:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:54,917 INFO L225 Difference]: With dead ends: 4143 [2022-02-15 13:45:54,918 INFO L226 Difference]: Without dead ends: 4117 [2022-02-15 13:45:54,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=2379, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:45:54,918 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 365 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:54,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 281 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:45:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2022-02-15 13:45:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 1795. [2022-02-15 13:45:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 2.4849498327759196) internal successors, (4458), 1794 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 4458 transitions. [2022-02-15 13:45:54,945 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 4458 transitions. Word has length 30 [2022-02-15 13:45:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:54,945 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 4458 transitions. [2022-02-15 13:45:54,945 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 13:45:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 4458 transitions. [2022-02-15 13:45:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:54,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:54,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:54,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-15 13:45:55,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:55,163 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 406013504, now seen corresponding path program 5 times [2022-02-15 13:45:55,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:55,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657988417] [2022-02-15 13:45:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:55,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:55,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:55,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657988417] [2022-02-15 13:45:55,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657988417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:55,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583164264] [2022-02-15 13:45:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:45:55,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:55,508 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 13:45:55,509 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 13:45:55,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:45:55,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:55,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:55,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:45:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:55,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:56,052 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:56,052 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:45:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:56,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:56,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583164264] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:56,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:56,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:45:56,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079010574] [2022-02-15 13:45:56,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:56,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:45:56,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:45:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:45:56,117 INFO L87 Difference]: Start difference. First operand 1795 states and 4458 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 13:45:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:45:57,455 INFO L93 Difference]: Finished difference Result 3791 states and 9382 transitions. [2022-02-15 13:45:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:45:57,455 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 30 [2022-02-15 13:45:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:45:57,460 INFO L225 Difference]: With dead ends: 3791 [2022-02-15 13:45:57,460 INFO L226 Difference]: Without dead ends: 3768 [2022-02-15 13:45:57,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=2521, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:45:57,461 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 468 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:45:57,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 328 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:45:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2022-02-15 13:45:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 1789. [2022-02-15 13:45:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.483780760626398) internal successors, (4441), 1788 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:45:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 4441 transitions. [2022-02-15 13:45:57,487 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 4441 transitions. Word has length 30 [2022-02-15 13:45:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:45:57,487 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 4441 transitions. [2022-02-15 13:45:57,487 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 13:45:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 4441 transitions. [2022-02-15 13:45:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:45:57,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:45:57,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:45:57,506 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 13:45:57,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:57,697 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:45:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:45:57,697 INFO L85 PathProgramCache]: Analyzing trace with hash -907231520, now seen corresponding path program 6 times [2022-02-15 13:45:57,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:45:57,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884898861] [2022-02-15 13:45:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:45:57,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:45:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:45:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:58,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:45:58,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884898861] [2022-02-15 13:45:58,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884898861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:45:58,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779783952] [2022-02-15 13:45:58,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:45:58,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:45:58,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:45:58,028 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 13:45:58,029 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 13:45:58,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:45:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:45:58,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:45:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:45:58,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:45:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:45:58,726 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:45:58,726 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:45:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:45:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:45:58,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:45:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:45:58,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779783952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:45:58,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:45:58,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:45:58,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347979528] [2022-02-15 13:45:58,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:45:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:45:58,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:45:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:45:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:45:58,829 INFO L87 Difference]: Start difference. First operand 1789 states and 4441 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 13:46:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:00,444 INFO L93 Difference]: Finished difference Result 3496 states and 8687 transitions. [2022-02-15 13:46:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:46:00,444 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 30 [2022-02-15 13:46:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:00,448 INFO L225 Difference]: With dead ends: 3496 [2022-02-15 13:46:00,448 INFO L226 Difference]: Without dead ends: 3486 [2022-02-15 13:46:00,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:46:00,449 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 475 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:00,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 379 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:46:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2022-02-15 13:46:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 1786. [2022-02-15 13:46:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.484033613445378) internal successors, (4434), 1785 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4434 transitions. [2022-02-15 13:46:00,473 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4434 transitions. Word has length 30 [2022-02-15 13:46:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:00,473 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4434 transitions. [2022-02-15 13:46:00,473 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 13:46:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4434 transitions. [2022-02-15 13:46:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:00,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:00,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:00,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:00,691 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,SelfDestructingSolverStorable110 [2022-02-15 13:46:00,691 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2107543106, now seen corresponding path program 7 times [2022-02-15 13:46:00,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:00,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389329066] [2022-02-15 13:46:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:00,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:01,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:01,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389329066] [2022-02-15 13:46:01,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389329066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:01,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263307565] [2022-02-15 13:46:01,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:46:01,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:01,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:01,020 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 13:46:01,083 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 13:46:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:01,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:01,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:46:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:01,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:01,624 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:01,624 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:01,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:01,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:01,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:01,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263307565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:01,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:01,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:46:01,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053016850] [2022-02-15 13:46:01,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:01,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:46:01,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:46:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:46:01,695 INFO L87 Difference]: Start difference. First operand 1786 states and 4434 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:02,918 INFO L93 Difference]: Finished difference Result 3593 states and 8975 transitions. [2022-02-15 13:46:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:46:02,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:02,924 INFO L225 Difference]: With dead ends: 3593 [2022-02-15 13:46:02,924 INFO L226 Difference]: Without dead ends: 3582 [2022-02-15 13:46:02,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=2526, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:46:02,925 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:02,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 235 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:46:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-02-15 13:46:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 1828. [2022-02-15 13:46:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.4893267651888342) internal successors, (4548), 1827 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4548 transitions. [2022-02-15 13:46:02,954 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4548 transitions. Word has length 30 [2022-02-15 13:46:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:02,954 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4548 transitions. [2022-02-15 13:46:02,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4548 transitions. [2022-02-15 13:46:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:02,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:02,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:02,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:03,172 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,SelfDestructingSolverStorable111 [2022-02-15 13:46:03,172 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -431023140, now seen corresponding path program 8 times [2022-02-15 13:46:03,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:03,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437016510] [2022-02-15 13:46:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:03,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:03,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:03,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437016510] [2022-02-15 13:46:03,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437016510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:03,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38527035] [2022-02-15 13:46:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:46:03,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:03,367 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 13:46:03,367 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 13:46:03,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:46:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:03,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:46:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:03,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:03,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-15 13:46:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:03,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:04,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:04,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:04,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:46:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:04,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38527035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:04,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:04,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-02-15 13:46:04,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907147686] [2022-02-15 13:46:04,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:04,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:46:04,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:46:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:46:04,451 INFO L87 Difference]: Start difference. First operand 1828 states and 4548 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 13:46:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:07,278 INFO L93 Difference]: Finished difference Result 3834 states and 9707 transitions. [2022-02-15 13:46:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:46:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 30 [2022-02-15 13:46:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:07,284 INFO L225 Difference]: With dead ends: 3834 [2022-02-15 13:46:07,284 INFO L226 Difference]: Without dead ends: 3820 [2022-02-15 13:46:07,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1026, Invalid=5454, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 13:46:07,285 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 561 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:07,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 172 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1020 Invalid, 0 Unknown, 2278 Unchecked, 0.5s Time] [2022-02-15 13:46:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-02-15 13:46:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 1896. [2022-02-15 13:46:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.491820580474934) internal successors, (4722), 1895 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 4722 transitions. [2022-02-15 13:46:07,310 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 4722 transitions. Word has length 30 [2022-02-15 13:46:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:07,310 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 4722 transitions. [2022-02-15 13:46:07,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 13:46:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 4722 transitions. [2022-02-15 13:46:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:07,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:07,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:07,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 13:46:07,528 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,SelfDestructingSolverStorable112 [2022-02-15 13:46:07,528 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1348973330, now seen corresponding path program 9 times [2022-02-15 13:46:07,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:07,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622424958] [2022-02-15 13:46:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:07,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:07,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:07,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622424958] [2022-02-15 13:46:07,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622424958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:07,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406419391] [2022-02-15 13:46:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:46:07,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:07,818 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 13:46:07,818 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 13:46:07,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:46:07,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:07,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:08,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:46:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:08,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:08,471 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:08,471 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:08,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:08,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406419391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:08,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:08,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:46:08,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146644886] [2022-02-15 13:46:08,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:08,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:46:08,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:46:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:46:08,544 INFO L87 Difference]: Start difference. First operand 1896 states and 4722 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 13:46:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:10,120 INFO L93 Difference]: Finished difference Result 4395 states and 10982 transitions. [2022-02-15 13:46:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:46:10,120 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 30 [2022-02-15 13:46:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:10,126 INFO L225 Difference]: With dead ends: 4395 [2022-02-15 13:46:10,126 INFO L226 Difference]: Without dead ends: 4362 [2022-02-15 13:46:10,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=656, Invalid=3766, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:46:10,127 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 498 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:10,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 214 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:46:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2022-02-15 13:46:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 1858. [2022-02-15 13:46:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 2.492191707054389) internal successors, (4628), 1857 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 4628 transitions. [2022-02-15 13:46:10,157 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 4628 transitions. Word has length 30 [2022-02-15 13:46:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:10,158 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 4628 transitions. [2022-02-15 13:46:10,158 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 13:46:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 4628 transitions. [2022-02-15 13:46:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:10,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:10,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:10,177 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 13:46:10,375 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,SelfDestructingSolverStorable113 [2022-02-15 13:46:10,375 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2002363052, now seen corresponding path program 10 times [2022-02-15 13:46:10,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:10,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768418946] [2022-02-15 13:46:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:10,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:10,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:10,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768418946] [2022-02-15 13:46:10,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768418946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:10,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779129416] [2022-02-15 13:46:10,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:46:10,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:10,675 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 13:46:10,676 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 13:46:10,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:46:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:10,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:11,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:46:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:11,294 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:11,294 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:11,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:11,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779129416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:11,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:11,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:46:11,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872663518] [2022-02-15 13:46:11,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:11,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:46:11,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:46:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:46:11,357 INFO L87 Difference]: Start difference. First operand 1858 states and 4628 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 13:46:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:12,931 INFO L93 Difference]: Finished difference Result 3812 states and 9447 transitions. [2022-02-15 13:46:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:46:12,931 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 30 [2022-02-15 13:46:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:12,936 INFO L225 Difference]: With dead ends: 3812 [2022-02-15 13:46:12,936 INFO L226 Difference]: Without dead ends: 3776 [2022-02-15 13:46:12,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:46:12,937 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 525 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:12,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 295 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:46:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-02-15 13:46:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 1852. [2022-02-15 13:46:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.4905456509994597) internal successors, (4610), 1851 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4610 transitions. [2022-02-15 13:46:12,962 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4610 transitions. Word has length 30 [2022-02-15 13:46:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:12,962 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 4610 transitions. [2022-02-15 13:46:12,962 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 13:46:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4610 transitions. [2022-02-15 13:46:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:12,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:12,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:12,980 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 13:46:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:13,179 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 979359220, now seen corresponding path program 11 times [2022-02-15 13:46:13,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:13,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296517912] [2022-02-15 13:46:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:13,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:13,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:13,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296517912] [2022-02-15 13:46:13,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296517912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:13,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482683749] [2022-02-15 13:46:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:46:13,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:13,381 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 13:46:13,381 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 13:46:13,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:46:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:13,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:13,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:46:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:14,084 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:14,085 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:14,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:14,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:14,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:14,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482683749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:14,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:14,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:46:14,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760174491] [2022-02-15 13:46:14,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:14,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:46:14,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:46:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:46:14,198 INFO L87 Difference]: Start difference. First operand 1852 states and 4610 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 13:46:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:15,645 INFO L93 Difference]: Finished difference Result 3543 states and 8809 transitions. [2022-02-15 13:46:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:46:15,646 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 30 [2022-02-15 13:46:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:15,651 INFO L225 Difference]: With dead ends: 3543 [2022-02-15 13:46:15,651 INFO L226 Difference]: Without dead ends: 3530 [2022-02-15 13:46:15,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:46:15,652 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 427 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:15,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 255 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:46:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-02-15 13:46:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 1849. [2022-02-15 13:46:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.490800865800866) internal successors, (4603), 1848 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 4603 transitions. [2022-02-15 13:46:15,686 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 4603 transitions. Word has length 30 [2022-02-15 13:46:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:15,686 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 4603 transitions. [2022-02-15 13:46:15,686 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 13:46:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 4603 transitions. [2022-02-15 13:46:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:15,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:15,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:15,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:15,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:15,904 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1792281482, now seen corresponding path program 12 times [2022-02-15 13:46:15,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:15,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882925912] [2022-02-15 13:46:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:15,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:16,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:16,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882925912] [2022-02-15 13:46:16,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882925912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:16,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825646344] [2022-02-15 13:46:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:46:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:16,233 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 13:46:16,233 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 13:46:16,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:46:16,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:16,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:46:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:16,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:16,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-02-15 13:46:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:16,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:17,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:17,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:17,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:17,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:46:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:17,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825646344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:17,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:17,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-15 13:46:17,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936738588] [2022-02-15 13:46:17,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:17,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:46:17,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:46:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:46:17,448 INFO L87 Difference]: Start difference. First operand 1849 states and 4603 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:21,351 INFO L93 Difference]: Finished difference Result 3731 states and 9399 transitions. [2022-02-15 13:46:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:46:21,352 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:21,356 INFO L225 Difference]: With dead ends: 3731 [2022-02-15 13:46:21,356 INFO L226 Difference]: Without dead ends: 3722 [2022-02-15 13:46:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1228, Invalid=6254, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:46:21,356 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 424 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 4817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2959 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:21,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 166 Invalid, 4817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1639 Invalid, 0 Unknown, 2959 Unchecked, 0.6s Time] [2022-02-15 13:46:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2022-02-15 13:46:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2005. [2022-02-15 13:46:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 2.5099800399201597) internal successors, (5030), 2004 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 5030 transitions. [2022-02-15 13:46:21,380 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 5030 transitions. Word has length 30 [2022-02-15 13:46:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:21,380 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 5030 transitions. [2022-02-15 13:46:21,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 5030 transitions. [2022-02-15 13:46:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:21,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:21,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:21,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:21,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-15 13:46:21,598 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash -746284764, now seen corresponding path program 13 times [2022-02-15 13:46:21,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:21,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888533176] [2022-02-15 13:46:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:21,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:21,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:21,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888533176] [2022-02-15 13:46:21,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888533176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:21,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476430024] [2022-02-15 13:46:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:46:21,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:21,872 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 13:46:21,873 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 13:46:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:21,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:22,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:46:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:22,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:22,459 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:22,460 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:22,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:22,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476430024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:22,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:22,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:46:22,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012083734] [2022-02-15 13:46:22,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:22,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:46:22,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:46:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:46:22,565 INFO L87 Difference]: Start difference. First operand 2005 states and 5030 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 13:46:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:24,137 INFO L93 Difference]: Finished difference Result 4310 states and 10878 transitions. [2022-02-15 13:46:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:46:24,137 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 30 [2022-02-15 13:46:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:24,143 INFO L225 Difference]: With dead ends: 4310 [2022-02-15 13:46:24,143 INFO L226 Difference]: Without dead ends: 4278 [2022-02-15 13:46:24,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=548, Invalid=3484, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:46:24,144 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 424 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:24,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 255 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:46:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2022-02-15 13:46:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 2018. [2022-02-15 13:46:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.5101636093207733) internal successors, (5063), 2017 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5063 transitions. [2022-02-15 13:46:24,176 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5063 transitions. Word has length 30 [2022-02-15 13:46:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5063 transitions. [2022-02-15 13:46:24,176 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 13:46:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5063 transitions. [2022-02-15 13:46:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:24,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:24,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:24,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-15 13:46:24,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:24,386 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash 375380018, now seen corresponding path program 14 times [2022-02-15 13:46:24,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:24,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744266789] [2022-02-15 13:46:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:24,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:24,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:24,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744266789] [2022-02-15 13:46:24,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744266789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:24,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182438562] [2022-02-15 13:46:24,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:46:24,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:24,694 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 13:46:24,695 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 13:46:24,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:46:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:24,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:24,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:46:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:25,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:25,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:25,225 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:25,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:25,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:25,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:25,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182438562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:25,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:25,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:46:25,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192031920] [2022-02-15 13:46:25,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:25,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:46:25,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:46:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:46:25,298 INFO L87 Difference]: Start difference. First operand 2018 states and 5063 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:26,988 INFO L93 Difference]: Finished difference Result 3825 states and 9610 transitions. [2022-02-15 13:46:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:46:26,988 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:26,993 INFO L225 Difference]: With dead ends: 3825 [2022-02-15 13:46:26,993 INFO L226 Difference]: Without dead ends: 3805 [2022-02-15 13:46:26,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:46:26,994 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:26,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 243 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:46:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-02-15 13:46:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2008. [2022-02-15 13:46:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.509715994020927) internal successors, (5037), 2007 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5037 transitions. [2022-02-15 13:46:27,020 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5037 transitions. Word has length 30 [2022-02-15 13:46:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:27,021 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 5037 transitions. [2022-02-15 13:46:27,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5037 transitions. [2022-02-15 13:46:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:27,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:27,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:27,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:27,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:27,238 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 782669304, now seen corresponding path program 15 times [2022-02-15 13:46:27,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:27,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733235445] [2022-02-15 13:46:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:27,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:27,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:27,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733235445] [2022-02-15 13:46:27,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733235445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:27,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798943439] [2022-02-15 13:46:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:46:27,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:27,566 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 13:46:27,567 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 13:46:27,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:46:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:27,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:27,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:46:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:28,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:28,245 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:28,245 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:28,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:28,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:28,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:28,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798943439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:28,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:28,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:46:28,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153538670] [2022-02-15 13:46:28,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:28,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:46:28,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:46:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:46:28,320 INFO L87 Difference]: Start difference. First operand 2008 states and 5037 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 13:46:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:29,779 INFO L93 Difference]: Finished difference Result 3728 states and 9330 transitions. [2022-02-15 13:46:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:46:29,779 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 30 [2022-02-15 13:46:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:29,784 INFO L225 Difference]: With dead ends: 3728 [2022-02-15 13:46:29,784 INFO L226 Difference]: Without dead ends: 3689 [2022-02-15 13:46:29,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:46:29,785 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 549 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 185 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:46:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2022-02-15 13:46:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 2008. [2022-02-15 13:46:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.5092177379172895) internal successors, (5036), 2007 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5036 transitions. [2022-02-15 13:46:29,810 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5036 transitions. Word has length 30 [2022-02-15 13:46:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:29,811 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 5036 transitions. [2022-02-15 13:46:29,811 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 13:46:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5036 transitions. [2022-02-15 13:46:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:29,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:29,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:29,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:30,028 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,SelfDestructingSolverStorable119 [2022-02-15 13:46:30,028 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 465824108, now seen corresponding path program 16 times [2022-02-15 13:46:30,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:30,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206519799] [2022-02-15 13:46:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:30,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:30,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:30,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206519799] [2022-02-15 13:46:30,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206519799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:30,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232528807] [2022-02-15 13:46:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:46:30,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:30,287 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 13:46:30,287 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 13:46:30,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:46:30,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:30,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:30,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:46:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:30,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:30,847 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:30,847 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:30,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:30,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:30,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232528807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:30,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:30,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:46:30,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114908992] [2022-02-15 13:46:30,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:30,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:46:30,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:46:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:46:30,913 INFO L87 Difference]: Start difference. First operand 2008 states and 5036 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:33,383 INFO L93 Difference]: Finished difference Result 3795 states and 9547 transitions. [2022-02-15 13:46:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:46:33,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:33,388 INFO L225 Difference]: With dead ends: 3795 [2022-02-15 13:46:33,388 INFO L226 Difference]: Without dead ends: 3784 [2022-02-15 13:46:33,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=559, Invalid=4697, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:46:33,389 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 444 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:33,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 223 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:46:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2022-02-15 13:46:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 2017. [2022-02-15 13:46:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.5109126984126986) internal successors, (5062), 2016 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5062 transitions. [2022-02-15 13:46:33,417 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5062 transitions. Word has length 30 [2022-02-15 13:46:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 5062 transitions. [2022-02-15 13:46:33,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5062 transitions. [2022-02-15 13:46:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:33,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:33,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:33,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:33,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:33,635 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2072742138, now seen corresponding path program 17 times [2022-02-15 13:46:33,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:33,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390443588] [2022-02-15 13:46:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:33,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:33,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390443588] [2022-02-15 13:46:33,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390443588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:33,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074330814] [2022-02-15 13:46:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:46:33,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:33,954 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 13:46:33,955 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 13:46:33,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:46:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:33,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:33,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:34,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:46:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:34,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:34,489 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:34,489 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:34,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:34,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:34,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074330814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:34,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:34,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:46:34,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617566984] [2022-02-15 13:46:34,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:34,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:46:34,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:46:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:46:34,578 INFO L87 Difference]: Start difference. First operand 2017 states and 5062 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 13:46:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:36,675 INFO L93 Difference]: Finished difference Result 4392 states and 11081 transitions. [2022-02-15 13:46:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 13:46:36,675 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 30 [2022-02-15 13:46:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:36,681 INFO L225 Difference]: With dead ends: 4392 [2022-02-15 13:46:36,681 INFO L226 Difference]: Without dead ends: 4359 [2022-02-15 13:46:36,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=692, Invalid=5314, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:46:36,682 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 471 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:36,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 241 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:46:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2022-02-15 13:46:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 2011. [2022-02-15 13:46:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.508955223880597) internal successors, (5043), 2010 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5043 transitions. [2022-02-15 13:46:36,714 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5043 transitions. Word has length 30 [2022-02-15 13:46:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 5043 transitions. [2022-02-15 13:46:36,714 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 13:46:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5043 transitions. [2022-02-15 13:46:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:36,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:36,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:36,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-15 13:46:36,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:36,932 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1958766222, now seen corresponding path program 18 times [2022-02-15 13:46:36,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:36,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720054145] [2022-02-15 13:46:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:36,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:37,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:37,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720054145] [2022-02-15 13:46:37,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720054145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:37,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986889910] [2022-02-15 13:46:37,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:46:37,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:37,208 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 13:46:37,208 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 13:46:37,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:46:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:37,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:46:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:37,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:37,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-15 13:46:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:37,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:38,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:38,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:38,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:46:38,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:46:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:38,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986889910] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:38,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:38,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-15 13:46:38,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182432918] [2022-02-15 13:46:38,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:38,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:46:38,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:46:38,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:46:38,307 INFO L87 Difference]: Start difference. First operand 2011 states and 5043 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 13:46:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:44,510 INFO L93 Difference]: Finished difference Result 4961 states and 12462 transitions. [2022-02-15 13:46:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-15 13:46:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 30 [2022-02-15 13:46:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:44,516 INFO L225 Difference]: With dead ends: 4961 [2022-02-15 13:46:44,517 INFO L226 Difference]: Without dead ends: 4950 [2022-02-15 13:46:44,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7494 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1998, Invalid=20652, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 13:46:44,518 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 707 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3920 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 4459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 3920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:44,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 288 Invalid, 4459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 3920 Invalid, 0 Unknown, 76 Unchecked, 1.7s Time] [2022-02-15 13:46:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-02-15 13:46:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 2018. [2022-02-15 13:46:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.508676251859197) internal successors, (5060), 2017 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5060 transitions. [2022-02-15 13:46:44,548 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5060 transitions. Word has length 30 [2022-02-15 13:46:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5060 transitions. [2022-02-15 13:46:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 13:46:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5060 transitions. [2022-02-15 13:46:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:44,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:44,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:44,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:44,764 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,SelfDestructingSolverStorable122 [2022-02-15 13:46:44,764 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash -575675730, now seen corresponding path program 19 times [2022-02-15 13:46:44,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:44,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792390251] [2022-02-15 13:46:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:44,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:45,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:45,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792390251] [2022-02-15 13:46:45,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792390251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:45,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633360285] [2022-02-15 13:46:45,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:46:45,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:45,081 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 13:46:45,095 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 13:46:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:45,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:45,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:46:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:45,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:45,789 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:45,789 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:45,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:45,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:45,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:45,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633360285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:45,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:45,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:46:45,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488427695] [2022-02-15 13:46:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:45,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:46:45,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:46:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:46:45,891 INFO L87 Difference]: Start difference. First operand 2018 states and 5060 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:48,203 INFO L93 Difference]: Finished difference Result 3781 states and 9549 transitions. [2022-02-15 13:46:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:46:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:48,208 INFO L225 Difference]: With dead ends: 3781 [2022-02-15 13:46:48,208 INFO L226 Difference]: Without dead ends: 3772 [2022-02-15 13:46:48,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:46:48,208 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 334 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2739 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:48,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 288 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2739 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:46:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2022-02-15 13:46:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2034. [2022-02-15 13:46:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.5086079685194296) internal successors, (5100), 2033 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5100 transitions. [2022-02-15 13:46:48,233 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5100 transitions. Word has length 30 [2022-02-15 13:46:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:48,233 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 5100 transitions. [2022-02-15 13:46:48,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5100 transitions. [2022-02-15 13:46:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:48,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:48,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:48,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:48,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:48,451 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1042393320, now seen corresponding path program 20 times [2022-02-15 13:46:48,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:48,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655924156] [2022-02-15 13:46:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:48,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:48,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:48,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655924156] [2022-02-15 13:46:48,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655924156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:48,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505614569] [2022-02-15 13:46:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:46:48,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:48,730 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 13:46:48,731 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 13:46:48,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:46:48,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:48,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:48,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:49,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:46:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:49,268 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:49,268 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:49,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:49,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505614569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:49,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:49,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:46:49,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072378117] [2022-02-15 13:46:49,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:49,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:46:49,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:46:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:46:49,351 INFO L87 Difference]: Start difference. First operand 2034 states and 5100 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:51,847 INFO L93 Difference]: Finished difference Result 4013 states and 10183 transitions. [2022-02-15 13:46:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 13:46:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:51,853 INFO L225 Difference]: With dead ends: 4013 [2022-02-15 13:46:51,853 INFO L226 Difference]: Without dead ends: 4002 [2022-02-15 13:46:51,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=627, Invalid=5225, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:46:51,854 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 424 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:51,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 252 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:46:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2022-02-15 13:46:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 2043. [2022-02-15 13:46:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.5102840352595495) internal successors, (5126), 2042 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 5126 transitions. [2022-02-15 13:46:51,898 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 5126 transitions. Word has length 30 [2022-02-15 13:46:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:51,899 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 5126 transitions. [2022-02-15 13:46:51,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 5126 transitions. [2022-02-15 13:46:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:51,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:51,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:51,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-15 13:46:52,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-15 13:46:52,115 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1707596488, now seen corresponding path program 21 times [2022-02-15 13:46:52,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:52,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963430199] [2022-02-15 13:46:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:52,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:52,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:52,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963430199] [2022-02-15 13:46:52,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963430199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:52,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515887307] [2022-02-15 13:46:52,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:46:52,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:52,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:52,395 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 13:46:52,395 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 13:46:52,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:46:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:52,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:52,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:46:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:52,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:53,055 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:53,055 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:46:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:53,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:53,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515887307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:53,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:53,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:46:53,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150841390] [2022-02-15 13:46:53,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:53,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:46:53,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:46:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:46:53,157 INFO L87 Difference]: Start difference. First operand 2043 states and 5126 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:55,836 INFO L93 Difference]: Finished difference Result 4359 states and 11056 transitions. [2022-02-15 13:46:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:46:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:46:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:55,842 INFO L225 Difference]: With dead ends: 4359 [2022-02-15 13:46:55,843 INFO L226 Difference]: Without dead ends: 4326 [2022-02-15 13:46:55,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=697, Invalid=5623, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:46:55,844 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 503 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:55,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 272 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:46:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-02-15 13:46:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 2034. [2022-02-15 13:46:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.5086079685194296) internal successors, (5100), 2033 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5100 transitions. [2022-02-15 13:46:55,878 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5100 transitions. Word has length 30 [2022-02-15 13:46:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:55,878 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 5100 transitions. [2022-02-15 13:46:55,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5100 transitions. [2022-02-15 13:46:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:55,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:55,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:55,898 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 13:46:56,081 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,SelfDestructingSolverStorable125 [2022-02-15 13:46:56,082 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1589117498, now seen corresponding path program 22 times [2022-02-15 13:46:56,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:56,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935191177] [2022-02-15 13:46:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:56,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:56,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:56,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935191177] [2022-02-15 13:46:56,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935191177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:56,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874909205] [2022-02-15 13:46:56,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:46:56,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:56,355 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 13:46:56,357 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 13:46:56,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:46:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:56,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:46:56,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:46:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:56,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:46:56,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:46:56,954 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:46:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:46:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:46:57,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:46:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:57,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874909205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:46:57,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:46:57,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:46:57,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991636197] [2022-02-15 13:46:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:46:57,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:46:57,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:46:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:46:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:46:57,078 INFO L87 Difference]: Start difference. First operand 2034 states and 5100 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:46:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:46:59,356 INFO L93 Difference]: Finished difference Result 3749 states and 9472 transitions. [2022-02-15 13:46:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:46:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:46:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:46:59,361 INFO L225 Difference]: With dead ends: 3749 [2022-02-15 13:46:59,362 INFO L226 Difference]: Without dead ends: 3740 [2022-02-15 13:46:59,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:46:59,362 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 367 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:46:59,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 254 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:46:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2022-02-15 13:46:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 2033. [2022-02-15 13:46:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.5088582677165356) internal successors, (5098), 2032 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:46:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5098 transitions. [2022-02-15 13:46:59,390 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5098 transitions. Word has length 30 [2022-02-15 13:46:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:46:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5098 transitions. [2022-02-15 13:46:59,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:46:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5098 transitions. [2022-02-15 13:46:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:46:59,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:46:59,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:46:59,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-15 13:46:59,608 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,SelfDestructingSolverStorable126 [2022-02-15 13:46:59,608 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:46:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:46:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 196043354, now seen corresponding path program 23 times [2022-02-15 13:46:59,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:46:59,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858644623] [2022-02-15 13:46:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:46:59,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:46:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:46:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:46:59,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:46:59,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858644623] [2022-02-15 13:46:59,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858644623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:46:59,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937347415] [2022-02-15 13:46:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:46:59,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:46:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:46:59,813 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 13:46:59,814 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 13:46:59,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:46:59,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:46:59,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:46:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:00,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:47:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:00,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:00,324 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:00,325 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:47:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:00,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:00,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937347415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:00,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:00,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:47:00,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195872410] [2022-02-15 13:47:00,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:00,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:47:00,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:47:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:47:00,420 INFO L87 Difference]: Start difference. First operand 2033 states and 5098 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:02,487 INFO L93 Difference]: Finished difference Result 3963 states and 9981 transitions. [2022-02-15 13:47:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:47:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:02,494 INFO L225 Difference]: With dead ends: 3963 [2022-02-15 13:47:02,494 INFO L226 Difference]: Without dead ends: 3952 [2022-02-15 13:47:02,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=597, Invalid=4373, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:47:02,496 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 537 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:02,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 161 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:47:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-02-15 13:47:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 2089. [2022-02-15 13:47:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.5134099616858236) internal successors, (5248), 2088 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5248 transitions. [2022-02-15 13:47:02,529 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5248 transitions. Word has length 30 [2022-02-15 13:47:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 5248 transitions. [2022-02-15 13:47:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5248 transitions. [2022-02-15 13:47:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:02,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:02,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:02,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:02,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:02,747 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1952444404, now seen corresponding path program 24 times [2022-02-15 13:47:02,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:02,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521503869] [2022-02-15 13:47:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:02,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:03,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:03,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521503869] [2022-02-15 13:47:03,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521503869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:03,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911274755] [2022-02-15 13:47:03,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:47:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:03,076 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 13:47:03,079 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 13:47:03,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:47:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:03,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:47:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:03,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:47:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:03,583 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:03,583 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:47:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:03,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:03,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911274755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:03,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:03,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:47:03,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613957763] [2022-02-15 13:47:03,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:03,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:47:03,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:47:03,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:47:03,642 INFO L87 Difference]: Start difference. First operand 2089 states and 5248 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 13:47:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:06,150 INFO L93 Difference]: Finished difference Result 4543 states and 11484 transitions. [2022-02-15 13:47:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:47:06,150 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 30 [2022-02-15 13:47:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:06,156 INFO L225 Difference]: With dead ends: 4543 [2022-02-15 13:47:06,156 INFO L226 Difference]: Without dead ends: 4499 [2022-02-15 13:47:06,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=931, Invalid=6725, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:47:06,157 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 532 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:06,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 219 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:47:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4499 states. [2022-02-15 13:47:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4499 to 2083. [2022-02-15 13:47:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.510086455331412) internal successors, (5226), 2082 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5226 transitions. [2022-02-15 13:47:06,187 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5226 transitions. Word has length 30 [2022-02-15 13:47:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:06,187 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 5226 transitions. [2022-02-15 13:47:06,187 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 13:47:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5226 transitions. [2022-02-15 13:47:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:06,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:06,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:06,205 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 13:47:06,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:06,403 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:06,403 INFO L85 PathProgramCache]: Analyzing trace with hash -813568824, now seen corresponding path program 25 times [2022-02-15 13:47:06,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:06,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784291700] [2022-02-15 13:47:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:06,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:06,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:06,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784291700] [2022-02-15 13:47:06,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784291700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:06,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134284756] [2022-02-15 13:47:06,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:47:06,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:06,772 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 13:47:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:06,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:06,803 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 13:47:07,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:47:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:07,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:07,341 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:07,341 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:47:07,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:07,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:07,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:07,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:07,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134284756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:07,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:07,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:47:07,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187393872] [2022-02-15 13:47:07,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:47:07,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:47:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:47:07,409 INFO L87 Difference]: Start difference. First operand 2083 states and 5226 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 13:47:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:09,442 INFO L93 Difference]: Finished difference Result 4059 states and 10141 transitions. [2022-02-15 13:47:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:47:09,442 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 30 [2022-02-15 13:47:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:09,448 INFO L225 Difference]: With dead ends: 4059 [2022-02-15 13:47:09,448 INFO L226 Difference]: Without dead ends: 4004 [2022-02-15 13:47:09,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=5235, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:47:09,448 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 594 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:09,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 233 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:47:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2022-02-15 13:47:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2083. [2022-02-15 13:47:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.509606147934678) internal successors, (5225), 2082 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5225 transitions. [2022-02-15 13:47:09,474 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5225 transitions. Word has length 30 [2022-02-15 13:47:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:09,474 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 5225 transitions. [2022-02-15 13:47:09,474 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 13:47:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5225 transitions. [2022-02-15 13:47:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:09,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:09,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:09,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:09,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-15 13:47:09,690 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash 260676860, now seen corresponding path program 26 times [2022-02-15 13:47:09,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:09,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442274055] [2022-02-15 13:47:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:09,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:09,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:09,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442274055] [2022-02-15 13:47:09,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442274055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:09,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792963268] [2022-02-15 13:47:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:47:09,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:09,904 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 13:47:09,906 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 13:47:09,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:47:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:09,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:47:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:10,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:10,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-15 13:47:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:10,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:10,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:47:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:10,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792963268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:10,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:10,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-15 13:47:10,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261828104] [2022-02-15 13:47:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:10,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:47:10,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:47:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:47:10,956 INFO L87 Difference]: Start difference. First operand 2083 states and 5225 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:14,195 INFO L93 Difference]: Finished difference Result 3770 states and 9481 transitions. [2022-02-15 13:47:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:47:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:14,201 INFO L225 Difference]: With dead ends: 3770 [2022-02-15 13:47:14,201 INFO L226 Difference]: Without dead ends: 3761 [2022-02-15 13:47:14,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1041, Invalid=5931, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 13:47:14,202 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 459 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1629 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:14,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 156 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1822 Invalid, 0 Unknown, 1629 Unchecked, 0.9s Time] [2022-02-15 13:47:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2022-02-15 13:47:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2162. [2022-02-15 13:47:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.5145765849143915) internal successors, (5434), 2161 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5434 transitions. [2022-02-15 13:47:14,229 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5434 transitions. Word has length 30 [2022-02-15 13:47:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:14,229 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 5434 transitions. [2022-02-15 13:47:14,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5434 transitions. [2022-02-15 13:47:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:14,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:14,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:14,447 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,SelfDestructingSolverStorable130 [2022-02-15 13:47:14,447 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2017077910, now seen corresponding path program 27 times [2022-02-15 13:47:14,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:14,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877297207] [2022-02-15 13:47:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:14,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:14,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:14,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877297207] [2022-02-15 13:47:14,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877297207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:14,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884076616] [2022-02-15 13:47:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:47:14,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:14,775 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 13:47:14,775 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 13:47:14,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:47:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:14,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:47:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:15,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:15,109 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 3 case distinctions, treesize of input 29 treesize of output 45 [2022-02-15 13:47:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:15,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:16,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:16,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:16,021 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:47:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:16,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884076616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:16,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:16,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-15 13:47:16,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324567055] [2022-02-15 13:47:16,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:16,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 13:47:16,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 13:47:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:47:16,057 INFO L87 Difference]: Start difference. First operand 2162 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 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 13:47:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:18,827 INFO L93 Difference]: Finished difference Result 4548 states and 11481 transitions. [2022-02-15 13:47:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:47:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 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 30 [2022-02-15 13:47:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:18,834 INFO L225 Difference]: With dead ends: 4548 [2022-02-15 13:47:18,834 INFO L226 Difference]: Without dead ends: 4537 [2022-02-15 13:47:18,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1224, Invalid=6432, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:47:18,834 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 592 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:18,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 185 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1846 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-02-15 13:47:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2022-02-15 13:47:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 2172. [2022-02-15 13:47:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.5149700598802394) internal successors, (5460), 2171 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5460 transitions. [2022-02-15 13:47:18,863 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5460 transitions. Word has length 30 [2022-02-15 13:47:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 2172 states and 5460 transitions. [2022-02-15 13:47:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 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 13:47:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5460 transitions. [2022-02-15 13:47:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:18,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:19,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:19,082 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1099127720, now seen corresponding path program 28 times [2022-02-15 13:47:19,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:19,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879347671] [2022-02-15 13:47:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:19,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:19,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:19,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879347671] [2022-02-15 13:47:19,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879347671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:19,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683627281] [2022-02-15 13:47:19,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:47:19,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:19,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:19,331 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 13:47:19,332 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 13:47:19,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:47:19,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:19,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:19,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:19,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:47:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:19,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:19,778 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:19,778 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:47:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:19,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:19,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683627281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:19,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:19,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:47:19,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297678956] [2022-02-15 13:47:19,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:19,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:47:19,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:47:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:47:19,836 INFO L87 Difference]: Start difference. First operand 2172 states and 5460 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 13:47:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:22,949 INFO L93 Difference]: Finished difference Result 4843 states and 12194 transitions. [2022-02-15 13:47:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 13:47:22,949 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 30 [2022-02-15 13:47:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:22,954 INFO L225 Difference]: With dead ends: 4843 [2022-02-15 13:47:22,954 INFO L226 Difference]: Without dead ends: 4813 [2022-02-15 13:47:22,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1353, Invalid=10637, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 13:47:22,955 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 572 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:22,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 205 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:47:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2022-02-15 13:47:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 2167. [2022-02-15 13:47:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5138504155124655) internal successors, (5445), 2166 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5445 transitions. [2022-02-15 13:47:22,984 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5445 transitions. Word has length 30 [2022-02-15 13:47:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:22,984 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 5445 transitions. [2022-02-15 13:47:22,984 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 13:47:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5445 transitions. [2022-02-15 13:47:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:22,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:22,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:23,002 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 13:47:23,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:23,202 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1156224604, now seen corresponding path program 29 times [2022-02-15 13:47:23,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:23,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921264067] [2022-02-15 13:47:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:23,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:23,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:23,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921264067] [2022-02-15 13:47:23,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921264067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:23,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812486222] [2022-02-15 13:47:23,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:47:23,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:23,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:23,421 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 13:47:23,421 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 13:47:23,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:47:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:23,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:23,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:47:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:23,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:23,852 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:23,852 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:47:23,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:23,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:23,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:23,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812486222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:23,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:23,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:47:23,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278001099] [2022-02-15 13:47:23,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:23,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:47:23,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:47:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:47:23,924 INFO L87 Difference]: Start difference. First operand 2167 states and 5445 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:25,938 INFO L93 Difference]: Finished difference Result 3994 states and 10078 transitions. [2022-02-15 13:47:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 13:47:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:25,943 INFO L225 Difference]: With dead ends: 3994 [2022-02-15 13:47:25,943 INFO L226 Difference]: Without dead ends: 3975 [2022-02-15 13:47:25,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=684, Invalid=5636, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:47:25,943 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 456 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:25,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 197 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2708 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:47:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2022-02-15 13:47:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2147. [2022-02-15 13:47:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.5158434296365333) internal successors, (5399), 2146 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 5399 transitions. [2022-02-15 13:47:25,971 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 5399 transitions. Word has length 30 [2022-02-15 13:47:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:25,971 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 5399 transitions. [2022-02-15 13:47:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 5399 transitions. [2022-02-15 13:47:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:25,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:25,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:25,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:26,182 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,SelfDestructingSolverStorable133 [2022-02-15 13:47:26,183 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2131053826, now seen corresponding path program 30 times [2022-02-15 13:47:26,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:26,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816935363] [2022-02-15 13:47:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:26,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:26,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:26,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816935363] [2022-02-15 13:47:26,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816935363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:26,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25203989] [2022-02-15 13:47:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:47:26,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:26,428 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 13:47:26,429 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 13:47:26,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:47:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:26,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:47:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:26,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:26,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-15 13:47:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:26,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:27,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:27,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:27,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:47:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:27,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25203989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:27,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:27,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-15 13:47:27,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406233962] [2022-02-15 13:47:27,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:27,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:47:27,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:47:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:47:27,242 INFO L87 Difference]: Start difference. First operand 2147 states and 5399 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 13:47:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:34,775 INFO L93 Difference]: Finished difference Result 5108 states and 12746 transitions. [2022-02-15 13:47:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-15 13:47:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 30 [2022-02-15 13:47:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:34,781 INFO L225 Difference]: With dead ends: 5108 [2022-02-15 13:47:34,781 INFO L226 Difference]: Without dead ends: 5097 [2022-02-15 13:47:34,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13100 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2824, Invalid=32708, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 13:47:34,782 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 895 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:34,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 306 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 4257 Invalid, 0 Unknown, 307 Unchecked, 1.9s Time] [2022-02-15 13:47:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-02-15 13:47:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 2298. [2022-02-15 13:47:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.518502394427514) internal successors, (5785), 2297 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5785 transitions. [2022-02-15 13:47:34,815 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5785 transitions. Word has length 30 [2022-02-15 13:47:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:34,815 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 5785 transitions. [2022-02-15 13:47:34,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 13:47:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5785 transitions. [2022-02-15 13:47:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:34,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:34,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:34,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:35,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 13:47:35,033 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash 400382510, now seen corresponding path program 31 times [2022-02-15 13:47:35,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:35,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284105097] [2022-02-15 13:47:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:35,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:35,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:35,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284105097] [2022-02-15 13:47:35,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284105097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:35,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054054407] [2022-02-15 13:47:35,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:47:35,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:35,268 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 13:47:35,269 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 13:47:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:35,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:35,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:47:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:35,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:35,918 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:35,918 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:47:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:35,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:36,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054054407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:36,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:36,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:47:36,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359302380] [2022-02-15 13:47:36,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:36,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:47:36,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:47:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:47:36,010 INFO L87 Difference]: Start difference. First operand 2298 states and 5785 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:37,874 INFO L93 Difference]: Finished difference Result 4484 states and 11349 transitions. [2022-02-15 13:47:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:47:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:37,881 INFO L225 Difference]: With dead ends: 4484 [2022-02-15 13:47:37,881 INFO L226 Difference]: Without dead ends: 4463 [2022-02-15 13:47:37,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=495, Invalid=3795, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:47:37,882 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 382 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2098 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:37,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 184 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2098 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:47:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2022-02-15 13:47:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 2332. [2022-02-15 13:47:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.520806520806521) internal successors, (5876), 2331 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 5876 transitions. [2022-02-15 13:47:37,916 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 5876 transitions. Word has length 30 [2022-02-15 13:47:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:37,916 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 5876 transitions. [2022-02-15 13:47:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 5876 transitions. [2022-02-15 13:47:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:37,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:37,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:37,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:38,134 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,SelfDestructingSolverStorable135 [2022-02-15 13:47:38,135 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash -727801376, now seen corresponding path program 32 times [2022-02-15 13:47:38,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:38,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286989086] [2022-02-15 13:47:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:38,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:38,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286989086] [2022-02-15 13:47:38,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286989086] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164064161] [2022-02-15 13:47:38,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:47:38,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:38,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:38,422 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 13:47:38,422 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 13:47:38,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:47:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:38,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:47:38,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:38,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:38,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 37 [2022-02-15 13:47:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:38,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:39,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:39,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:39,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:47:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:39,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164064161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:39,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:39,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2022-02-15 13:47:39,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246170678] [2022-02-15 13:47:39,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:39,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:47:39,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:47:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:47:39,573 INFO L87 Difference]: Start difference. First operand 2332 states and 5876 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 13:47:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:42,134 INFO L93 Difference]: Finished difference Result 3763 states and 9467 transitions. [2022-02-15 13:47:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:47:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 30 [2022-02-15 13:47:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:42,139 INFO L225 Difference]: With dead ends: 3763 [2022-02-15 13:47:42,139 INFO L226 Difference]: Without dead ends: 3750 [2022-02-15 13:47:42,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=953, Invalid=4017, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:47:42,140 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:42,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 215 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 959 Invalid, 0 Unknown, 1561 Unchecked, 0.5s Time] [2022-02-15 13:47:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-02-15 13:47:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 2430. [2022-02-15 13:47:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 2.527377521613833) internal successors, (6139), 2429 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 6139 transitions. [2022-02-15 13:47:42,171 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 6139 transitions. Word has length 30 [2022-02-15 13:47:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:42,171 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 6139 transitions. [2022-02-15 13:47:42,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 13:47:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 6139 transitions. [2022-02-15 13:47:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:42,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:42,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:42,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-15 13:47:42,378 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 85120886, now seen corresponding path program 33 times [2022-02-15 13:47:42,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:42,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090461938] [2022-02-15 13:47:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:42,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:42,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:42,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090461938] [2022-02-15 13:47:42,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090461938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:42,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861631562] [2022-02-15 13:47:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:47:42,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:42,685 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 13:47:42,686 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 13:47:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:47:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:42,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-15 13:47:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:42,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:42,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-15 13:47:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:43,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:43,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:47:43,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:47:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:43,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861631562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:43,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:43,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-02-15 13:47:43,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735414223] [2022-02-15 13:47:43,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:43,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:47:43,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:47:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:47:43,533 INFO L87 Difference]: Start difference. First operand 2430 states and 6139 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:49,182 INFO L93 Difference]: Finished difference Result 5067 states and 12840 transitions. [2022-02-15 13:47:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 13:47:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:49,189 INFO L225 Difference]: With dead ends: 5067 [2022-02-15 13:47:49,189 INFO L226 Difference]: Without dead ends: 5052 [2022-02-15 13:47:49,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5667 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2161, Invalid=12119, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 13:47:49,190 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 651 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3417 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:49,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 126 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1382 Invalid, 0 Unknown, 3417 Unchecked, 0.6s Time] [2022-02-15 13:47:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-02-15 13:47:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 2529. [2022-02-15 13:47:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.53125) internal successors, (6399), 2528 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 6399 transitions. [2022-02-15 13:47:49,224 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 6399 transitions. Word has length 30 [2022-02-15 13:47:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:49,225 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 6399 transitions. [2022-02-15 13:47:49,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 6399 transitions. [2022-02-15 13:47:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:49,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:49,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:49,243 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 13:47:49,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:49,443 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:49,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1331780578, now seen corresponding path program 34 times [2022-02-15 13:47:49,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:49,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118187968] [2022-02-15 13:47:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:49,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:49,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:49,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118187968] [2022-02-15 13:47:49,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118187968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:49,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866678747] [2022-02-15 13:47:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:47:49,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:49,817 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 13:47:49,817 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 13:47:49,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:47:49,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:49,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:50,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:47:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:50,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:50,361 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:50,361 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:47:50,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:50,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:50,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:50,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866678747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:50,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:50,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:47:50,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429462069] [2022-02-15 13:47:50,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:50,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:47:50,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:47:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:47:50,438 INFO L87 Difference]: Start difference. First operand 2529 states and 6399 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:52,426 INFO L93 Difference]: Finished difference Result 4506 states and 11402 transitions. [2022-02-15 13:47:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:47:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:52,431 INFO L225 Difference]: With dead ends: 4506 [2022-02-15 13:47:52,431 INFO L226 Difference]: Without dead ends: 4489 [2022-02-15 13:47:52,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=642, Invalid=4908, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:47:52,432 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 400 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:52,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 184 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:47:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2022-02-15 13:47:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 2497. [2022-02-15 13:47:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.5292467948717947) internal successors, (6313), 2496 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6313 transitions. [2022-02-15 13:47:52,464 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6313 transitions. Word has length 30 [2022-02-15 13:47:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:52,464 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 6313 transitions. [2022-02-15 13:47:52,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6313 transitions. [2022-02-15 13:47:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:52,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:52,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:52,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:52,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-15 13:47:52,682 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1241336488, now seen corresponding path program 35 times [2022-02-15 13:47:52,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:52,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330718329] [2022-02-15 13:47:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:52,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:53,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:53,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330718329] [2022-02-15 13:47:53,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330718329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:53,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509674837] [2022-02-15 13:47:53,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:47:53,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:53,017 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 13:47:53,018 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 13:47:53,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:47:53,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:53,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:53,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:47:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:53,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:53,636 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:53,636 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:47:53,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:53,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:53,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:53,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509674837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:53,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:53,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:47:53,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660714327] [2022-02-15 13:47:53,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:53,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:47:53,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:47:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:47:53,736 INFO L87 Difference]: Start difference. First operand 2497 states and 6313 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:56,275 INFO L93 Difference]: Finished difference Result 4364 states and 11046 transitions. [2022-02-15 13:47:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:47:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:47:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:56,281 INFO L225 Difference]: With dead ends: 4364 [2022-02-15 13:47:56,281 INFO L226 Difference]: Without dead ends: 4353 [2022-02-15 13:47:56,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=758, Invalid=6552, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:47:56,281 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 424 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:56,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 194 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:47:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2022-02-15 13:47:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 2500. [2022-02-15 13:47:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 2.5290116046418567) internal successors, (6320), 2499 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 6320 transitions. [2022-02-15 13:47:56,311 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 6320 transitions. Word has length 30 [2022-02-15 13:47:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:56,312 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 6320 transitions. [2022-02-15 13:47:56,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 6320 transitions. [2022-02-15 13:47:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:56,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:56,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:56,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:56,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-15 13:47:56,529 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash 515064562, now seen corresponding path program 36 times [2022-02-15 13:47:56,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:56,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651749569] [2022-02-15 13:47:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:56,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:56,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:56,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651749569] [2022-02-15 13:47:56,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651749569] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:56,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792379743] [2022-02-15 13:47:56,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:47:56,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:56,727 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 13:47:56,728 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 13:47:56,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:47:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:47:56,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:47:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:47:56,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:47:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:47:57,142 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:47:57,142 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:47:57,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:57,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:47:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:47:57,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:47:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:57,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792379743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:47:57,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:47:57,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:47:57,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119641487] [2022-02-15 13:47:57,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:47:57,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:47:57,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:47:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:47:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:47:57,199 INFO L87 Difference]: Start difference. First operand 2500 states and 6320 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 13:47:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:47:59,519 INFO L93 Difference]: Finished difference Result 4965 states and 12577 transitions. [2022-02-15 13:47:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:47:59,520 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 30 [2022-02-15 13:47:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:47:59,526 INFO L225 Difference]: With dead ends: 4965 [2022-02-15 13:47:59,526 INFO L226 Difference]: Without dead ends: 4932 [2022-02-15 13:47:59,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=931, Invalid=7625, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:47:59,527 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 484 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:47:59,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 217 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:47:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-02-15 13:47:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 2497. [2022-02-15 13:47:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.5292467948717947) internal successors, (6313), 2496 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:47:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6313 transitions. [2022-02-15 13:47:59,564 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6313 transitions. Word has length 30 [2022-02-15 13:47:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:47:59,564 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 6313 transitions. [2022-02-15 13:47:59,564 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 13:47:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6313 transitions. [2022-02-15 13:47:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:47:59,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:47:59,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:47:59,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-15 13:47:59,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:59,782 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:47:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:47:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash 629040478, now seen corresponding path program 37 times [2022-02-15 13:47:59,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:47:59,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778758169] [2022-02-15 13:47:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:47:59,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:47:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:47:59,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:47:59,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778758169] [2022-02-15 13:47:59,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778758169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:47:59,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392323959] [2022-02-15 13:47:59,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:47:59,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:47:59,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:47:59,957 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 13:47:59,958 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 13:47:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:47:59,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:47:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:00,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:48:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:00,369 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:00,369 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:00,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:00,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:00,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392323959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:00,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:00,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:48:00,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959226772] [2022-02-15 13:48:00,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:48:00,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:48:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:48:00,446 INFO L87 Difference]: Start difference. First operand 2497 states and 6313 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:48:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:02,152 INFO L93 Difference]: Finished difference Result 4233 states and 10728 transitions. [2022-02-15 13:48:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:48:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:48:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:02,158 INFO L225 Difference]: With dead ends: 4233 [2022-02-15 13:48:02,158 INFO L226 Difference]: Without dead ends: 4224 [2022-02-15 13:48:02,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=441, Invalid=4115, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:48:02,158 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:02,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 258 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:48:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2022-02-15 13:48:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2479. [2022-02-15 13:48:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.5294592413236483) internal successors, (6268), 2478 states have internal predecessors, (6268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 6268 transitions. [2022-02-15 13:48:02,189 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 6268 transitions. Word has length 30 [2022-02-15 13:48:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 6268 transitions. [2022-02-15 13:48:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 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 13:48:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 6268 transitions. [2022-02-15 13:48:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:02,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:02,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:02,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:02,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:02,407 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1247885158, now seen corresponding path program 26 times [2022-02-15 13:48:02,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:02,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323240366] [2022-02-15 13:48:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:02,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:02,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:02,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323240366] [2022-02-15 13:48:02,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323240366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:02,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250757428] [2022-02-15 13:48:02,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:48:02,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:02,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:02,612 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 13:48:02,613 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 13:48:02,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:48:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:02,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:02,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:48:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:02,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:03,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:03,051 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:03,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:03,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250757428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:03,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:03,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:48:03,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413322967] [2022-02-15 13:48:03,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:48:03,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:48:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:48:03,119 INFO L87 Difference]: Start difference. First operand 2479 states and 6268 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 13:48:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:05,115 INFO L93 Difference]: Finished difference Result 4082 states and 10235 transitions. [2022-02-15 13:48:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:48:05,115 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 30 [2022-02-15 13:48:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:05,129 INFO L225 Difference]: With dead ends: 4082 [2022-02-15 13:48:05,129 INFO L226 Difference]: Without dead ends: 4055 [2022-02-15 13:48:05,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=653, Invalid=5047, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:48:05,129 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 443 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:05,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 198 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:48:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2022-02-15 13:48:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 2462. [2022-02-15 13:48:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 2.5286468915075173) internal successors, (6223), 2461 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 6223 transitions. [2022-02-15 13:48:05,156 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 6223 transitions. Word has length 30 [2022-02-15 13:48:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:05,156 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 6223 transitions. [2022-02-15 13:48:05,156 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 13:48:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 6223 transitions. [2022-02-15 13:48:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:05,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:05,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:05,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:05,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:05,374 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1722930192, now seen corresponding path program 27 times [2022-02-15 13:48:05,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:05,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044880550] [2022-02-15 13:48:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:05,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:05,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:05,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044880550] [2022-02-15 13:48:05,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044880550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:05,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547738183] [2022-02-15 13:48:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:48:05,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:05,658 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 13:48:05,659 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 13:48:05,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:48:05,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:05,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:05,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:05,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:48:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:06,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:06,195 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:06,196 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:06,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:06,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:06,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:06,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547738183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:06,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:06,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:48:06,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326886106] [2022-02-15 13:48:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:06,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:48:06,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:48:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:48:06,267 INFO L87 Difference]: Start difference. First operand 2462 states and 6223 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 13:48:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:07,536 INFO L93 Difference]: Finished difference Result 4111 states and 10284 transitions. [2022-02-15 13:48:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:48:07,536 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 30 [2022-02-15 13:48:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:07,542 INFO L225 Difference]: With dead ends: 4111 [2022-02-15 13:48:07,542 INFO L226 Difference]: Without dead ends: 4101 [2022-02-15 13:48:07,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2511, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:48:07,542 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 406 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:07,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 401 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:48:07,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2022-02-15 13:48:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 2450. [2022-02-15 13:48:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 2.5300122498979176) internal successors, (6196), 2449 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 6196 transitions. [2022-02-15 13:48:07,575 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 6196 transitions. Word has length 30 [2022-02-15 13:48:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:07,575 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 6196 transitions. [2022-02-15 13:48:07,575 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 13:48:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 6196 transitions. [2022-02-15 13:48:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:07,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:07,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:07,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:07,793 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,SelfDestructingSolverStorable143 [2022-02-15 13:48:07,793 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2009648608, now seen corresponding path program 38 times [2022-02-15 13:48:07,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:07,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150155782] [2022-02-15 13:48:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:07,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:08,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:08,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150155782] [2022-02-15 13:48:08,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150155782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:08,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91088450] [2022-02-15 13:48:08,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:48:08,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:08,075 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 13:48:08,077 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 13:48:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:48:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:08,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:48:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:08,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:48:08,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2022-02-15 13:48:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:08,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:09,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:09,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:48:09,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:48:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:09,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91088450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:09,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:09,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2022-02-15 13:48:09,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916823132] [2022-02-15 13:48:09,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:09,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:48:09,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:09,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:48:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:48:09,171 INFO L87 Difference]: Start difference. First operand 2450 states and 6196 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 13:48:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:11,588 INFO L93 Difference]: Finished difference Result 4016 states and 10137 transitions. [2022-02-15 13:48:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:48:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 30 [2022-02-15 13:48:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:11,594 INFO L225 Difference]: With dead ends: 4016 [2022-02-15 13:48:11,594 INFO L226 Difference]: Without dead ends: 4003 [2022-02-15 13:48:11,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=927, Invalid=4475, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:48:11,594 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 439 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1696 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:11,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 188 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 931 Invalid, 0 Unknown, 1696 Unchecked, 0.4s Time] [2022-02-15 13:48:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2022-02-15 13:48:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 2501. [2022-02-15 13:48:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 2.5336) internal successors, (6334), 2500 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 6334 transitions. [2022-02-15 13:48:11,625 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 6334 transitions. Word has length 30 [2022-02-15 13:48:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 6334 transitions. [2022-02-15 13:48:11,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 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 13:48:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 6334 transitions. [2022-02-15 13:48:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:11,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:11,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:11,642 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 13:48:11,842 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,SelfDestructingSolverStorable144 [2022-02-15 13:48:11,842 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2141913320, now seen corresponding path program 39 times [2022-02-15 13:48:11,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:11,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053428568] [2022-02-15 13:48:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:11,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:12,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:12,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053428568] [2022-02-15 13:48:12,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053428568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:12,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941081948] [2022-02-15 13:48:12,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:48:12,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:12,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:12,117 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 13:48:12,118 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 13:48:12,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:48:12,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:12,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:12,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:48:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:12,751 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:12,752 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:12,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:12,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941081948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:12,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:12,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:48:12,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818917863] [2022-02-15 13:48:12,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:12,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:48:12,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:48:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:48:12,841 INFO L87 Difference]: Start difference. First operand 2501 states and 6334 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:48:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:14,268 INFO L93 Difference]: Finished difference Result 4529 states and 11503 transitions. [2022-02-15 13:48:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:48:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:48:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:14,274 INFO L225 Difference]: With dead ends: 4529 [2022-02-15 13:48:14,274 INFO L226 Difference]: Without dead ends: 4520 [2022-02-15 13:48:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:48:14,274 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 232 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:14,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 239 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:48:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-02-15 13:48:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 2530. [2022-02-15 13:48:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 2.5322261763542904) internal successors, (6404), 2529 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 6404 transitions. [2022-02-15 13:48:14,305 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 6404 transitions. Word has length 30 [2022-02-15 13:48:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:14,306 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 6404 transitions. [2022-02-15 13:48:14,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:48:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 6404 transitions. [2022-02-15 13:48:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:14,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:14,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:14,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-15 13:48:14,523 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,SelfDestructingSolverStorable145 [2022-02-15 13:48:14,523 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2003483948, now seen corresponding path program 40 times [2022-02-15 13:48:14,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:14,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891572506] [2022-02-15 13:48:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:14,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:14,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:14,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891572506] [2022-02-15 13:48:14,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891572506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:14,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123043595] [2022-02-15 13:48:14,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:48:14,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:14,714 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 13:48:14,715 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 13:48:14,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:48:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:14,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:14,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:14,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:48:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:14,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:15,145 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:15,146 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:15,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:15,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123043595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:15,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:15,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:48:15,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614343477] [2022-02-15 13:48:15,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:15,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:48:15,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:48:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:48:15,215 INFO L87 Difference]: Start difference. First operand 2530 states and 6404 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:16,793 INFO L93 Difference]: Finished difference Result 4749 states and 11904 transitions. [2022-02-15 13:48:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:48:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 30 [2022-02-15 13:48:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:16,800 INFO L225 Difference]: With dead ends: 4749 [2022-02-15 13:48:16,801 INFO L226 Difference]: Without dead ends: 4708 [2022-02-15 13:48:16,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=3657, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:48:16,801 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 356 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:16,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 420 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:48:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2022-02-15 13:48:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 2565. [2022-02-15 13:48:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2564 states have (on average 2.531201248049922) internal successors, (6490), 2564 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 6490 transitions. [2022-02-15 13:48:16,864 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 6490 transitions. Word has length 30 [2022-02-15 13:48:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:16,864 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 6490 transitions. [2022-02-15 13:48:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 6490 transitions. [2022-02-15 13:48:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:16,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:16,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:16,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:17,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:17,083 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 978238324, now seen corresponding path program 41 times [2022-02-15 13:48:17,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:17,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909564057] [2022-02-15 13:48:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:17,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:17,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:17,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909564057] [2022-02-15 13:48:17,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909564057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:17,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111384164] [2022-02-15 13:48:17,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:48:17,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:17,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:17,368 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 13:48:17,369 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 13:48:17,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:48:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:17,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:48:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:17,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-02-15 13:48:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:17,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:17,950 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:17,951 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:17,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:18,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111384164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:18,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:18,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:48:18,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964517705] [2022-02-15 13:48:18,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:18,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:48:18,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:48:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:48:18,029 INFO L87 Difference]: Start difference. First operand 2565 states and 6490 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:19,636 INFO L93 Difference]: Finished difference Result 4328 states and 10886 transitions. [2022-02-15 13:48:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:48:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 30 [2022-02-15 13:48:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:19,643 INFO L225 Difference]: With dead ends: 4328 [2022-02-15 13:48:19,644 INFO L226 Difference]: Without dead ends: 4315 [2022-02-15 13:48:19,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:48:19,644 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 352 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:19,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 389 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:48:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-02-15 13:48:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2573. [2022-02-15 13:48:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 2.530326594090202) internal successors, (6508), 2572 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 6508 transitions. [2022-02-15 13:48:19,686 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 6508 transitions. Word has length 30 [2022-02-15 13:48:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:19,686 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 6508 transitions. [2022-02-15 13:48:19,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 6508 transitions. [2022-02-15 13:48:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:19,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:19,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:19,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-15 13:48:19,903 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -747405660, now seen corresponding path program 42 times [2022-02-15 13:48:19,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:19,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978483779] [2022-02-15 13:48:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:19,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:20,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:20,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978483779] [2022-02-15 13:48:20,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978483779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:20,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039727571] [2022-02-15 13:48:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:48:20,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:20,210 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 13:48:20,211 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 13:48:20,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:48:20,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:20,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:48:20,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:20,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:48:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:20,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:20,752 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:20,753 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:20,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:20,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:20,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039727571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:20,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:20,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:48:20,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347901436] [2022-02-15 13:48:20,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:20,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:20,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:20,834 INFO L87 Difference]: Start difference. First operand 2573 states and 6508 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 13:48:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:23,573 INFO L93 Difference]: Finished difference Result 5160 states and 13118 transitions. [2022-02-15 13:48:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:48:23,573 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 30 [2022-02-15 13:48:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:23,580 INFO L225 Difference]: With dead ends: 5160 [2022-02-15 13:48:23,580 INFO L226 Difference]: Without dead ends: 5122 [2022-02-15 13:48:23,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=6751, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:48:23,581 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 375 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:23,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 288 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:48:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2022-02-15 13:48:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 2606. [2022-02-15 13:48:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 2.530902111324376) internal successors, (6593), 2605 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:23,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6593 transitions. [2022-02-15 13:48:23,620 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6593 transitions. Word has length 30 [2022-02-15 13:48:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:23,620 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 6593 transitions. [2022-02-15 13:48:23,620 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 13:48:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6593 transitions. [2022-02-15 13:48:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:23,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:23,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:23,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-15 13:48:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-15 13:48:23,830 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 781548408, now seen corresponding path program 43 times [2022-02-15 13:48:23,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:23,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730009380] [2022-02-15 13:48:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:23,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:24,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:24,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730009380] [2022-02-15 13:48:24,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730009380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:24,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360842161] [2022-02-15 13:48:24,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:48:24,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:24,128 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 13:48:24,129 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 13:48:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:24,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:24,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:48:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:24,552 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:24,552 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:24,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:24,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360842161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:24,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:24,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:48:24,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827901679] [2022-02-15 13:48:24,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:24,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:48:24,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:48:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:48:24,620 INFO L87 Difference]: Start difference. First operand 2606 states and 6593 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:26,155 INFO L93 Difference]: Finished difference Result 4454 states and 11219 transitions. [2022-02-15 13:48:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:48:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 30 [2022-02-15 13:48:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:26,161 INFO L225 Difference]: With dead ends: 4454 [2022-02-15 13:48:26,161 INFO L226 Difference]: Without dead ends: 4413 [2022-02-15 13:48:26,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=556, Invalid=4000, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:48:26,162 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 369 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:26,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 298 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:48:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2022-02-15 13:48:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2606. [2022-02-15 13:48:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 2.530134357005758) internal successors, (6591), 2605 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6591 transitions. [2022-02-15 13:48:26,191 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6591 transitions. Word has length 30 [2022-02-15 13:48:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:26,191 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 6591 transitions. [2022-02-15 13:48:26,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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 13:48:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6591 transitions. [2022-02-15 13:48:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:26,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:26,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:26,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-15 13:48:26,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:26,410 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1581347362, now seen corresponding path program 44 times [2022-02-15 13:48:26,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:26,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37959295] [2022-02-15 13:48:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:26,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37959295] [2022-02-15 13:48:26,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37959295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304121962] [2022-02-15 13:48:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:48:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:26,725 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:26,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-15 13:48:26,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:48:26,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:26,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:27,111 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:48:27,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-02-15 13:48:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:27,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:27,421 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:27,422 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:27,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:27,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:27,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:27,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304121962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:27,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:27,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:48:27,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614520661] [2022-02-15 13:48:27,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:27,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:27,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:27,529 INFO L87 Difference]: Start difference. First operand 2606 states and 6591 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 13:48:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:30,589 INFO L93 Difference]: Finished difference Result 4497 states and 11232 transitions. [2022-02-15 13:48:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:48:30,589 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 30 [2022-02-15 13:48:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:30,596 INFO L225 Difference]: With dead ends: 4497 [2022-02-15 13:48:30,596 INFO L226 Difference]: Without dead ends: 4458 [2022-02-15 13:48:30,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=969, Invalid=6863, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:48:30,597 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 622 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 3432 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 3432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:30,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 283 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 3432 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:48:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2022-02-15 13:48:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 2618. [2022-02-15 13:48:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 2.5288498280473823) internal successors, (6618), 2617 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 6618 transitions. [2022-02-15 13:48:30,637 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 6618 transitions. Word has length 30 [2022-02-15 13:48:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:30,637 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 6618 transitions. [2022-02-15 13:48:30,637 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 13:48:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 6618 transitions. [2022-02-15 13:48:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:30,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:30,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:30,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-15 13:48:30,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-15 13:48:30,855 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash -805575938, now seen corresponding path program 45 times [2022-02-15 13:48:30,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:30,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534357762] [2022-02-15 13:48:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:30,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:31,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:31,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534357762] [2022-02-15 13:48:31,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534357762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:31,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140186071] [2022-02-15 13:48:31,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:48:31,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:31,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:31,057 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:31,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-15 13:48:31,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:48:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:31,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:31,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:48:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:31,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:31,483 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:31,483 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:31,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:31,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:31,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:31,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140186071] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:31,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:31,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:48:31,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762437124] [2022-02-15 13:48:31,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:31,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:31,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:31,549 INFO L87 Difference]: Start difference. First operand 2618 states and 6618 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:48:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:35,257 INFO L93 Difference]: Finished difference Result 5187 states and 13000 transitions. [2022-02-15 13:48:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:48:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:48:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:35,264 INFO L225 Difference]: With dead ends: 5187 [2022-02-15 13:48:35,264 INFO L226 Difference]: Without dead ends: 5172 [2022-02-15 13:48:35,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1611, Invalid=11271, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:48:35,265 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 631 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 177 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:48:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2022-02-15 13:48:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 2621. [2022-02-15 13:48:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 2.5286259541984735) internal successors, (6625), 2620 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 6625 transitions. [2022-02-15 13:48:35,299 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 6625 transitions. Word has length 30 [2022-02-15 13:48:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:35,299 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 6625 transitions. [2022-02-15 13:48:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:48:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 6625 transitions. [2022-02-15 13:48:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:35,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:35,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:35,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:35,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:35,517 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash -140372770, now seen corresponding path program 46 times [2022-02-15 13:48:35,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:35,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786808582] [2022-02-15 13:48:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:35,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:35,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:35,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786808582] [2022-02-15 13:48:35,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786808582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:35,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917375167] [2022-02-15 13:48:35,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:48:35,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:35,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:35,858 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:35,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-15 13:48:35,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:48:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:35,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:36,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:48:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:36,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:36,281 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:36,281 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:36,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:36,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917375167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:36,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:36,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:48:36,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839039321] [2022-02-15 13:48:36,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:36,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:36,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:36,378 INFO L87 Difference]: Start difference. First operand 2621 states and 6625 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 13:48:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:38,748 INFO L93 Difference]: Finished difference Result 4726 states and 11885 transitions. [2022-02-15 13:48:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:48:38,748 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 30 [2022-02-15 13:48:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:38,754 INFO L225 Difference]: With dead ends: 4726 [2022-02-15 13:48:38,754 INFO L226 Difference]: Without dead ends: 4699 [2022-02-15 13:48:38,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=831, Invalid=5975, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:48:38,754 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 539 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:38,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 223 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:48:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2022-02-15 13:48:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 2621. [2022-02-15 13:48:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 2.5282442748091603) internal successors, (6624), 2620 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 6624 transitions. [2022-02-15 13:48:38,787 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 6624 transitions. Word has length 30 [2022-02-15 13:48:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:38,787 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 6624 transitions. [2022-02-15 13:48:38,787 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 13:48:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 6624 transitions. [2022-02-15 13:48:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:38,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:38,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:38,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:39,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:39,006 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 857880540, now seen corresponding path program 47 times [2022-02-15 13:48:39,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:39,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815975828] [2022-02-15 13:48:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:39,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:39,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:39,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815975828] [2022-02-15 13:48:39,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815975828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:39,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594096341] [2022-02-15 13:48:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:48:39,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:39,203 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-15 13:48:39,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:48:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:39,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:39,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:48:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:39,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:39,662 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:39,663 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:39,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:39,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594096341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:39,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:39,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:48:39,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834156919] [2022-02-15 13:48:39,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:39,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:39,732 INFO L87 Difference]: Start difference. First operand 2621 states and 6624 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:43,464 INFO L93 Difference]: Finished difference Result 4475 states and 11178 transitions. [2022-02-15 13:48:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:48:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:48:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:43,470 INFO L225 Difference]: With dead ends: 4475 [2022-02-15 13:48:43,470 INFO L226 Difference]: Without dead ends: 4448 [2022-02-15 13:48:43,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1057, Invalid=7315, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 13:48:43,471 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 678 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:43,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 224 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:48:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-02-15 13:48:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 2617. [2022-02-15 13:48:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 2.529051987767584) internal successors, (6616), 2616 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 6616 transitions. [2022-02-15 13:48:43,499 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 6616 transitions. Word has length 30 [2022-02-15 13:48:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 6616 transitions. [2022-02-15 13:48:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 6616 transitions. [2022-02-15 13:48:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:43,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:43,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:43,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-02-15 13:48:43,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:43,718 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash 467774620, now seen corresponding path program 48 times [2022-02-15 13:48:43,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:43,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55642998] [2022-02-15 13:48:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:43,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:44,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:44,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55642998] [2022-02-15 13:48:44,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55642998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:44,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383783068] [2022-02-15 13:48:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:48:44,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:44,012 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:44,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-15 13:48:44,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:48:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:44,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:44,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:44,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:48:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:44,565 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:44,565 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:48:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:44,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:44,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383783068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:44,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:44,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:48:44,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113236346] [2022-02-15 13:48:44,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:48:44,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:48:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:48:44,634 INFO L87 Difference]: Start difference. First operand 2617 states and 6616 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:46,509 INFO L93 Difference]: Finished difference Result 5264 states and 13360 transitions. [2022-02-15 13:48:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:48:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:48:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:46,516 INFO L225 Difference]: With dead ends: 5264 [2022-02-15 13:48:46,516 INFO L226 Difference]: Without dead ends: 5251 [2022-02-15 13:48:46,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=764, Invalid=5088, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:48:46,517 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 425 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:46,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 214 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:48:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2022-02-15 13:48:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 2651. [2022-02-15 13:48:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 2.529811320754717) internal successors, (6704), 2650 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 6704 transitions. [2022-02-15 13:48:46,553 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 6704 transitions. Word has length 30 [2022-02-15 13:48:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:46,553 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 6704 transitions. [2022-02-15 13:48:46,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 6704 transitions. [2022-02-15 13:48:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:46,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:46,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:46,771 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2070791626, now seen corresponding path program 49 times [2022-02-15 13:48:46,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:46,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937643496] [2022-02-15 13:48:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:46,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:46,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937643496] [2022-02-15 13:48:46,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937643496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:46,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182752384] [2022-02-15 13:48:46,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:48:46,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:46,967 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:46,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-15 13:48:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:46,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:46,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:47,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:48:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:47,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:47,379 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:47,380 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:47,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:47,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182752384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:47,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:47,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:48:47,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234464700] [2022-02-15 13:48:47,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:48:47,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:48:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:48:47,447 INFO L87 Difference]: Start difference. First operand 2651 states and 6704 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:49,704 INFO L93 Difference]: Finished difference Result 5028 states and 12745 transitions. [2022-02-15 13:48:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:48:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:48:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:49,711 INFO L225 Difference]: With dead ends: 5028 [2022-02-15 13:48:49,711 INFO L226 Difference]: Without dead ends: 4991 [2022-02-15 13:48:49,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=956, Invalid=6354, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:48:49,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 373 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:49,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 266 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:48:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2022-02-15 13:48:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 2654. [2022-02-15 13:48:49,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.528458349038824) internal successors, (6708), 2653 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 6708 transitions. [2022-02-15 13:48:49,751 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 6708 transitions. Word has length 30 [2022-02-15 13:48:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:49,751 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 6708 transitions. [2022-02-15 13:48:49,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 6708 transitions. [2022-02-15 13:48:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:49,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:49,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:49,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:49,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:49,967 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:49,967 INFO L85 PathProgramCache]: Analyzing trace with hash -541837558, now seen corresponding path program 50 times [2022-02-15 13:48:49,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:49,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953559209] [2022-02-15 13:48:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:49,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:50,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:50,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953559209] [2022-02-15 13:48:50,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953559209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:50,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005973330] [2022-02-15 13:48:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:48:50,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:50,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:50,285 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:50,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-15 13:48:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:48:50,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:50,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:50,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:50,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:48:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:50,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:50,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:50,954 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:51,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:51,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:51,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005973330] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:51,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:51,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-15 13:48:51,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960023675] [2022-02-15 13:48:51,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:51,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:48:51,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:48:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:48:51,046 INFO L87 Difference]: Start difference. First operand 2654 states and 6708 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:48:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:53,202 INFO L93 Difference]: Finished difference Result 4621 states and 11693 transitions. [2022-02-15 13:48:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:48:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:48:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:53,208 INFO L225 Difference]: With dead ends: 4621 [2022-02-15 13:48:53,208 INFO L226 Difference]: Without dead ends: 4608 [2022-02-15 13:48:53,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=3346, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:48:53,209 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 265 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 337 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:48:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2022-02-15 13:48:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 2645. [2022-02-15 13:48:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.527987897125567) internal successors, (6684), 2644 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 6684 transitions. [2022-02-15 13:48:53,240 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 6684 transitions. Word has length 30 [2022-02-15 13:48:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:53,240 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 6684 transitions. [2022-02-15 13:48:53,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:48:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 6684 transitions. [2022-02-15 13:48:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:53,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:53,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:53,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:53,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-15 13:48:53,459 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:53,459 INFO L85 PathProgramCache]: Analyzing trace with hash 532408126, now seen corresponding path program 51 times [2022-02-15 13:48:53,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:53,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271483757] [2022-02-15 13:48:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:53,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:53,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:53,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271483757] [2022-02-15 13:48:53,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271483757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:53,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377801933] [2022-02-15 13:48:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:48:53,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:53,748 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:53,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-15 13:48:53,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:48:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:53,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:48:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:54,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:48:54,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-02-15 13:48:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:54,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:54,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:48:54,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-15 13:48:54,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-15 13:48:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:54,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377801933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:54,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:54,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 36 [2022-02-15 13:48:54,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830546698] [2022-02-15 13:48:54,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:54,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:48:54,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:48:54,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:48:54,807 INFO L87 Difference]: Start difference. First operand 2645 states and 6684 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 13:48:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:48:58,118 INFO L93 Difference]: Finished difference Result 4820 states and 12265 transitions. [2022-02-15 13:48:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 13:48:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 30 [2022-02-15 13:48:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:48:58,125 INFO L225 Difference]: With dead ends: 4820 [2022-02-15 13:48:58,125 INFO L226 Difference]: Without dead ends: 4811 [2022-02-15 13:48:58,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1134, Invalid=7238, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 13:48:58,126 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 348 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:48:58,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 271 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2527 Invalid, 0 Unknown, 380 Unchecked, 1.1s Time] [2022-02-15 13:48:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-02-15 13:48:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 2680. [2022-02-15 13:48:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 2.528555431131019) internal successors, (6774), 2679 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:48:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 6774 transitions. [2022-02-15 13:48:58,160 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 6774 transitions. Word has length 30 [2022-02-15 13:48:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:48:58,161 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 6774 transitions. [2022-02-15 13:48:58,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 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 13:48:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 6774 transitions. [2022-02-15 13:48:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:48:58,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:48:58,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:48:58,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-15 13:48:58,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-15 13:48:58,379 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:48:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:48:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2006158120, now seen corresponding path program 52 times [2022-02-15 13:48:58,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:48:58,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734152502] [2022-02-15 13:48:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:48:58,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:48:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:48:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:58,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:48:58,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734152502] [2022-02-15 13:48:58,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734152502] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:48:58,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229904822] [2022-02-15 13:48:58,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:48:58,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:48:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:48:58,685 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:48:58,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-15 13:48:58,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:48:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:48:58,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:48:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:48:59,022 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:48:59,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 37 [2022-02-15 13:48:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:48:59,326 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:48:59,326 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:48:59,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:59,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:48:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:48:59,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:48:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:48:59,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229904822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:48:59,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:48:59,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:48:59,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249492804] [2022-02-15 13:48:59,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:48:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:48:59,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:48:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:48:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:48:59,397 INFO L87 Difference]: Start difference. First operand 2680 states and 6774 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:01,996 INFO L93 Difference]: Finished difference Result 4679 states and 11809 transitions. [2022-02-15 13:49:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:49:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:49:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:02,002 INFO L225 Difference]: With dead ends: 4679 [2022-02-15 13:49:02,002 INFO L226 Difference]: Without dead ends: 4657 [2022-02-15 13:49:02,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=698, Invalid=5002, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:49:02,002 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 404 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:02,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 196 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:49:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-02-15 13:49:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 2684. [2022-02-15 13:49:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 2.527767424524786) internal successors, (6782), 2683 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 6782 transitions. [2022-02-15 13:49:02,035 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 6782 transitions. Word has length 30 [2022-02-15 13:49:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:02,035 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 6782 transitions. [2022-02-15 13:49:02,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 6782 transitions. [2022-02-15 13:49:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:02,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:02,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:02,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:02,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-15 13:49:02,253 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash -884493338, now seen corresponding path program 53 times [2022-02-15 13:49:02,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:02,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038730099] [2022-02-15 13:49:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:02,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:02,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:02,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038730099] [2022-02-15 13:49:02,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038730099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:02,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808020289] [2022-02-15 13:49:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:49:02,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:02,585 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:02,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-15 13:49:02,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:49:02,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:02,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:02,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:02,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:03,117 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:03,117 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:03,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:03,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:03,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:03,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808020289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:03,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:03,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:49:03,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837556125] [2022-02-15 13:49:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:49:03,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:49:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:49:03,183 INFO L87 Difference]: Start difference. First operand 2684 states and 6782 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 13:49:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:06,642 INFO L93 Difference]: Finished difference Result 5069 states and 12712 transitions. [2022-02-15 13:49:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 13:49:06,643 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 30 [2022-02-15 13:49:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:06,650 INFO L225 Difference]: With dead ends: 5069 [2022-02-15 13:49:06,650 INFO L226 Difference]: Without dead ends: 5048 [2022-02-15 13:49:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4303 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1491, Invalid=10941, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:49:06,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 547 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:06,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 126 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:49:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2022-02-15 13:49:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 2655. [2022-02-15 13:49:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 2.527128862094951) internal successors, (6707), 2654 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 6707 transitions. [2022-02-15 13:49:06,685 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 6707 transitions. Word has length 30 [2022-02-15 13:49:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:06,685 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 6707 transitions. [2022-02-15 13:49:06,686 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 13:49:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 6707 transitions. [2022-02-15 13:49:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:06,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:06,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:06,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-15 13:49:06,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:06,927 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1892182204, now seen corresponding path program 54 times [2022-02-15 13:49:06,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:06,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656712528] [2022-02-15 13:49:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:06,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:07,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:07,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656712528] [2022-02-15 13:49:07,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656712528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:07,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180149583] [2022-02-15 13:49:07,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:49:07,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:07,236 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:07,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-15 13:49:07,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:49:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:07,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:07,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-15 13:49:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:07,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:07,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:07,877 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:07,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:07,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:07,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:07,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180149583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:07,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:07,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:49:07,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746973057] [2022-02-15 13:49:07,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:07,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:49:07,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:49:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:49:07,956 INFO L87 Difference]: Start difference. First operand 2655 states and 6707 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:11,627 INFO L93 Difference]: Finished difference Result 4423 states and 11054 transitions. [2022-02-15 13:49:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 13:49:11,628 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:49:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:11,634 INFO L225 Difference]: With dead ends: 4423 [2022-02-15 13:49:11,634 INFO L226 Difference]: Without dead ends: 4401 [2022-02-15 13:49:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1078, Invalid=8822, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 13:49:11,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 609 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:11,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 172 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:49:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-02-15 13:49:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2652. [2022-02-15 13:49:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.5277253866465483) internal successors, (6701), 2651 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 6701 transitions. [2022-02-15 13:49:11,668 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 6701 transitions. Word has length 30 [2022-02-15 13:49:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:11,668 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 6701 transitions. [2022-02-15 13:49:11,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 6701 transitions. [2022-02-15 13:49:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:11,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:11,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:11,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:11,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:11,887 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:11,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1451097388, now seen corresponding path program 28 times [2022-02-15 13:49:11,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:11,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132767329] [2022-02-15 13:49:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:11,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:12,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:12,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132767329] [2022-02-15 13:49:12,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132767329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:12,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270267426] [2022-02-15 13:49:12,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:49:12,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:12,105 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:12,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-15 13:49:12,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:49:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:12,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:12,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:12,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:49:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:12,742 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:12,742 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:12,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:12,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:12,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:49:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:12,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270267426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:12,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:12,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:49:12,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696053255] [2022-02-15 13:49:12,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:49:12,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:49:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:49:12,809 INFO L87 Difference]: Start difference. First operand 2652 states and 6701 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:49:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:16,768 INFO L93 Difference]: Finished difference Result 4992 states and 12473 transitions. [2022-02-15 13:49:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 13:49:16,768 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:49:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:16,776 INFO L225 Difference]: With dead ends: 4992 [2022-02-15 13:49:16,776 INFO L226 Difference]: Without dead ends: 4963 [2022-02-15 13:49:16,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1562, Invalid=12010, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 13:49:16,777 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 706 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 233 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:49:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2022-02-15 13:49:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 2691. [2022-02-15 13:49:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 2.527509293680297) internal successors, (6799), 2690 states have internal predecessors, (6799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 6799 transitions. [2022-02-15 13:49:16,814 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 6799 transitions. Word has length 30 [2022-02-15 13:49:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 6799 transitions. [2022-02-15 13:49:16,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:49:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 6799 transitions. [2022-02-15 13:49:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:16,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:16,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:16,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:17,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:17,033 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:17,034 INFO L85 PathProgramCache]: Analyzing trace with hash 830610252, now seen corresponding path program 29 times [2022-02-15 13:49:17,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:17,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448010497] [2022-02-15 13:49:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:17,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:17,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:17,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448010497] [2022-02-15 13:49:17,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448010497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:17,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469379649] [2022-02-15 13:49:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:49:17,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:17,269 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:17,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-15 13:49:17,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:49:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:17,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:17,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:17,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:17,694 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:17,695 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:17,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:17,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:17,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:17,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:49:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:17,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469379649] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:17,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:17,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:49:17,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371354632] [2022-02-15 13:49:17,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:17,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:49:17,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:49:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:49:17,753 INFO L87 Difference]: Start difference. First operand 2691 states and 6799 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:49:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:22,122 INFO L93 Difference]: Finished difference Result 5780 states and 14482 transitions. [2022-02-15 13:49:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-15 13:49:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:49:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:22,129 INFO L225 Difference]: With dead ends: 5780 [2022-02-15 13:49:22,129 INFO L226 Difference]: Without dead ends: 5751 [2022-02-15 13:49:22,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7718 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2333, Invalid=17973, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 13:49:22,130 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 700 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:22,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 209 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:49:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2022-02-15 13:49:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 2682. [2022-02-15 13:49:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 2.5274151436031334) internal successors, (6776), 2681 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 6776 transitions. [2022-02-15 13:49:22,167 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 6776 transitions. Word has length 30 [2022-02-15 13:49:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:22,167 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 6776 transitions. [2022-02-15 13:49:22,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:49:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 6776 transitions. [2022-02-15 13:49:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:22,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:22,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:22,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:22,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:22,383 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1495813420, now seen corresponding path program 30 times [2022-02-15 13:49:22,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:22,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111476020] [2022-02-15 13:49:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:22,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:22,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:22,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111476020] [2022-02-15 13:49:22,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111476020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:22,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490898392] [2022-02-15 13:49:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:49:22,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:22,601 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:22,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-15 13:49:22,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:49:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:22,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:22,899 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:49:22,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 44 [2022-02-15 13:49:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:22,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:23,151 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:23,151 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:23,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:23,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:23,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:23,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490898392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:23,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:23,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:49:23,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69594039] [2022-02-15 13:49:23,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:23,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:49:23,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:49:23,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:49:23,236 INFO L87 Difference]: Start difference. First operand 2682 states and 6776 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 13:49:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:26,941 INFO L93 Difference]: Finished difference Result 4983 states and 12548 transitions. [2022-02-15 13:49:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:49:26,941 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 30 [2022-02-15 13:49:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:26,949 INFO L225 Difference]: With dead ends: 4983 [2022-02-15 13:49:26,949 INFO L226 Difference]: Without dead ends: 4949 [2022-02-15 13:49:26,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1014, Invalid=8298, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 13:49:26,950 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 520 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:26,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 212 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 13:49:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-02-15 13:49:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 2682. [2022-02-15 13:49:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 2.526296158149944) internal successors, (6773), 2681 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 6773 transitions. [2022-02-15 13:49:26,991 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 6773 transitions. Word has length 30 [2022-02-15 13:49:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:26,991 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 6773 transitions. [2022-02-15 13:49:26,991 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 13:49:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 6773 transitions. [2022-02-15 13:49:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:26,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:26,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:27,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:27,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:27,207 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1918142958, now seen corresponding path program 31 times [2022-02-15 13:49:27,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:27,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285423018] [2022-02-15 13:49:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:27,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:27,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:27,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285423018] [2022-02-15 13:49:27,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285423018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:27,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309070415] [2022-02-15 13:49:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:49:27,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:27,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:27,503 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:27,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-15 13:49:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:27,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:27,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-15 13:49:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:27,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:28,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:28,112 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:28,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:49:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:28,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309070415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:28,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:28,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:49:28,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686552828] [2022-02-15 13:49:28,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:49:28,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:49:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:49:28,184 INFO L87 Difference]: Start difference. First operand 2682 states and 6773 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 13:49:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:30,546 INFO L93 Difference]: Finished difference Result 5115 states and 12936 transitions. [2022-02-15 13:49:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:49:30,547 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 30 [2022-02-15 13:49:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:30,554 INFO L225 Difference]: With dead ends: 5115 [2022-02-15 13:49:30,554 INFO L226 Difference]: Without dead ends: 5096 [2022-02-15 13:49:30,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:49:30,555 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 406 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:30,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 188 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:49:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2022-02-15 13:49:30,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 2691. [2022-02-15 13:49:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 2.5256505576208177) internal successors, (6794), 2690 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 6794 transitions. [2022-02-15 13:49:30,602 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 6794 transitions. Word has length 30 [2022-02-15 13:49:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:30,602 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 6794 transitions. [2022-02-15 13:49:30,602 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 13:49:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 6794 transitions. [2022-02-15 13:49:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:30,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:30,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:30,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-15 13:49:30,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:30,821 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:30,821 INFO L85 PathProgramCache]: Analyzing trace with hash -620423288, now seen corresponding path program 32 times [2022-02-15 13:49:30,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:30,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62639845] [2022-02-15 13:49:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:30,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:31,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62639845] [2022-02-15 13:49:31,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62639845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851065815] [2022-02-15 13:49:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:49:31,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:31,148 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:31,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-15 13:49:31,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:49:31,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:31,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:31,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:31,798 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:31,799 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:31,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:31,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:31,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:31,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851065815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:31,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:31,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:49:31,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696565341] [2022-02-15 13:49:31,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:31,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:49:31,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:49:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:49:31,893 INFO L87 Difference]: Start difference. First operand 2691 states and 6794 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:33,512 INFO L93 Difference]: Finished difference Result 4542 states and 11490 transitions. [2022-02-15 13:49:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:49:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:49:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:33,518 INFO L225 Difference]: With dead ends: 4542 [2022-02-15 13:49:33,518 INFO L226 Difference]: Without dead ends: 4521 [2022-02-15 13:49:33,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=562, Invalid=4130, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:49:33,518 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 377 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:33,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 184 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:49:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2022-02-15 13:49:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 2692. [2022-02-15 13:49:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.525455221107395) internal successors, (6796), 2691 states have internal predecessors, (6796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 6796 transitions. [2022-02-15 13:49:33,552 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 6796 transitions. Word has length 30 [2022-02-15 13:49:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:33,552 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 6796 transitions. [2022-02-15 13:49:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 6796 transitions. [2022-02-15 13:49:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:33,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:33,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:33,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:33,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-02-15 13:49:33,770 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -84979080, now seen corresponding path program 33 times [2022-02-15 13:49:33,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:33,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095588232] [2022-02-15 13:49:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:33,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:33,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:33,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095588232] [2022-02-15 13:49:33,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095588232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:33,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650552027] [2022-02-15 13:49:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:49:33,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:33,973 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:33,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-15 13:49:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:49:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:33,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:49:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:34,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:34,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:49:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:34,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:34,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:49:34,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:49:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:34,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650552027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:34,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:34,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-15 13:49:34,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941544043] [2022-02-15 13:49:34,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:34,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:49:34,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:49:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:49:34,719 INFO L87 Difference]: Start difference. First operand 2692 states and 6796 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:49:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:36,045 INFO L93 Difference]: Finished difference Result 4606 states and 11674 transitions. [2022-02-15 13:49:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:49:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 30 [2022-02-15 13:49:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:36,052 INFO L225 Difference]: With dead ends: 4606 [2022-02-15 13:49:36,052 INFO L226 Difference]: Without dead ends: 4598 [2022-02-15 13:49:36,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=654, Invalid=4316, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:49:36,052 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:36,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 155 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1184 Invalid, 0 Unknown, 891 Unchecked, 0.4s Time] [2022-02-15 13:49:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-02-15 13:49:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 2725. [2022-02-15 13:49:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 2.525697503671072) internal successors, (6880), 2724 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 6880 transitions. [2022-02-15 13:49:36,088 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 6880 transitions. Word has length 30 [2022-02-15 13:49:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:36,088 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 6880 transitions. [2022-02-15 13:49:36,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:49:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 6880 transitions. [2022-02-15 13:49:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:36,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:36,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:36,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:36,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-15 13:49:36,307 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1795877384, now seen corresponding path program 34 times [2022-02-15 13:49:36,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:36,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656419653] [2022-02-15 13:49:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:36,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:36,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:36,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656419653] [2022-02-15 13:49:36,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656419653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:36,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969001329] [2022-02-15 13:49:36,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:49:36,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:36,548 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:36,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-15 13:49:36,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:49:36,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:36,575 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:36,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:49:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:36,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:37,080 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:37,081 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:37,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:37,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969001329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:37,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:37,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:49:37,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148511087] [2022-02-15 13:49:37,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:37,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:49:37,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:49:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:49:37,166 INFO L87 Difference]: Start difference. First operand 2725 states and 6880 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:39,204 INFO L93 Difference]: Finished difference Result 4623 states and 11653 transitions. [2022-02-15 13:49:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:49:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:49:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:39,211 INFO L225 Difference]: With dead ends: 4623 [2022-02-15 13:49:39,212 INFO L226 Difference]: Without dead ends: 4611 [2022-02-15 13:49:39,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=459, Invalid=3701, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:49:39,212 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 341 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:39,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 229 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:49:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2022-02-15 13:49:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 2712. [2022-02-15 13:49:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.5256362965695316) internal successors, (6847), 2711 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6847 transitions. [2022-02-15 13:49:39,255 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6847 transitions. Word has length 30 [2022-02-15 13:49:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:39,255 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 6847 transitions. [2022-02-15 13:49:39,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6847 transitions. [2022-02-15 13:49:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:39,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:39,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:39,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-15 13:49:39,471 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1134442340, now seen corresponding path program 35 times [2022-02-15 13:49:39,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:39,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70470740] [2022-02-15 13:49:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:39,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:39,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:39,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70470740] [2022-02-15 13:49:39,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70470740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:39,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864747168] [2022-02-15 13:49:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:49:39,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:39,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:39,725 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:39,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-15 13:49:39,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:49:39,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:39,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:40,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:40,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:40,239 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:40,239 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:40,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:49:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:40,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864747168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:40,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:40,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:49:40,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930433910] [2022-02-15 13:49:40,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:40,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:49:40,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:49:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:49:40,323 INFO L87 Difference]: Start difference. First operand 2712 states and 6847 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 13:49:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:42,963 INFO L93 Difference]: Finished difference Result 4890 states and 12380 transitions. [2022-02-15 13:49:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:49:42,964 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 30 [2022-02-15 13:49:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:42,970 INFO L225 Difference]: With dead ends: 4890 [2022-02-15 13:49:42,970 INFO L226 Difference]: Without dead ends: 4871 [2022-02-15 13:49:42,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=738, Invalid=4962, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:49:42,971 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 441 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:42,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 253 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:49:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-02-15 13:49:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2720. [2022-02-15 13:49:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2719 states have (on average 2.526296432511953) internal successors, (6869), 2719 states have internal predecessors, (6869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 6869 transitions. [2022-02-15 13:49:43,007 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 6869 transitions. Word has length 30 [2022-02-15 13:49:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:43,007 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 6869 transitions. [2022-02-15 13:49:43,007 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 13:49:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 6869 transitions. [2022-02-15 13:49:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:43,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:43,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:43,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-15 13:49:43,223 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1404123906, now seen corresponding path program 36 times [2022-02-15 13:49:43,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:43,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910651817] [2022-02-15 13:49:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:43,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:43,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:43,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910651817] [2022-02-15 13:49:43,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910651817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:43,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669368500] [2022-02-15 13:49:43,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:49:43,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:43,528 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:43,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-15 13:49:43,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:49:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:43,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:43,825 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:49:43,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 48 [2022-02-15 13:49:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:43,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:44,044 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:44,044 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:44,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:44,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:44,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:44,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:44,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669368500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:44,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:44,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:49:44,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575418627] [2022-02-15 13:49:44,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:44,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:49:44,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:44,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:49:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:49:44,116 INFO L87 Difference]: Start difference. First operand 2720 states and 6869 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:45,965 INFO L93 Difference]: Finished difference Result 4653 states and 11794 transitions. [2022-02-15 13:49:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:49:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:49:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:45,971 INFO L225 Difference]: With dead ends: 4653 [2022-02-15 13:49:45,971 INFO L226 Difference]: Without dead ends: 4632 [2022-02-15 13:49:45,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=701, Invalid=4411, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:49:45,971 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 384 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:45,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 203 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:49:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2022-02-15 13:49:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 2722. [2022-02-15 13:49:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.525909592061742) internal successors, (6873), 2721 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 6873 transitions. [2022-02-15 13:49:46,004 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 6873 transitions. Word has length 30 [2022-02-15 13:49:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 6873 transitions. [2022-02-15 13:49:46,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 6873 transitions. [2022-02-15 13:49:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:46,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:46,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:46,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:46,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-15 13:49:46,222 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash -868679698, now seen corresponding path program 37 times [2022-02-15 13:49:46,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:46,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212410622] [2022-02-15 13:49:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:46,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:46,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:46,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212410622] [2022-02-15 13:49:46,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212410622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:46,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412113928] [2022-02-15 13:49:46,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:49:46,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:46,457 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:46,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-15 13:49:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:46,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:46,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:46,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:47,105 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:47,106 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:47,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:47,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:47,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:47,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:47,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412113928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:47,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:47,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:49:47,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722098598] [2022-02-15 13:49:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:47,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:49:47,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:49:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:49:47,215 INFO L87 Difference]: Start difference. First operand 2722 states and 6873 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:48,953 INFO L93 Difference]: Finished difference Result 4552 states and 11507 transitions. [2022-02-15 13:49:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:49:48,975 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:49:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:48,981 INFO L225 Difference]: With dead ends: 4552 [2022-02-15 13:49:48,981 INFO L226 Difference]: Without dead ends: 4542 [2022-02-15 13:49:48,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=515, Invalid=3517, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:49:48,982 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 291 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:48,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 285 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:49:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-02-15 13:49:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2719. [2022-02-15 13:49:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.526122148638705) internal successors, (6866), 2718 states have internal predecessors, (6866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 6866 transitions. [2022-02-15 13:49:49,016 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 6866 transitions. Word has length 30 [2022-02-15 13:49:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:49,016 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 6866 transitions. [2022-02-15 13:49:49,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 6866 transitions. [2022-02-15 13:49:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:49,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:49,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:49,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-15 13:49:49,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:49,227 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -463933560, now seen corresponding path program 38 times [2022-02-15 13:49:49,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:49,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621161779] [2022-02-15 13:49:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:49,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:49,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:49,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621161779] [2022-02-15 13:49:49,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621161779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:49,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821208570] [2022-02-15 13:49:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:49:49,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:49,500 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:49,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-15 13:49:49,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:49:49,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:49,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:49,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:49:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:49,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:50,022 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:50,023 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:50,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:50,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:50,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821208570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:50,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:50,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:49:50,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852588906] [2022-02-15 13:49:50,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:50,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:49:50,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:49:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:49:50,092 INFO L87 Difference]: Start difference. First operand 2719 states and 6866 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:51,514 INFO L93 Difference]: Finished difference Result 4527 states and 11439 transitions. [2022-02-15 13:49:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:49:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:49:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:51,521 INFO L225 Difference]: With dead ends: 4527 [2022-02-15 13:49:51,521 INFO L226 Difference]: Without dead ends: 4517 [2022-02-15 13:49:51,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:49:51,521 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 304 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 294 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:49:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2022-02-15 13:49:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 2716. [2022-02-15 13:49:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 2.5263351749539593) internal successors, (6859), 2715 states have internal predecessors, (6859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 6859 transitions. [2022-02-15 13:49:51,558 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 6859 transitions. Word has length 30 [2022-02-15 13:49:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:51,558 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 6859 transitions. [2022-02-15 13:49:51,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:49:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 6859 transitions. [2022-02-15 13:49:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:51,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:51,561 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:51,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-15 13:49:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:51,776 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 627544692, now seen corresponding path program 55 times [2022-02-15 13:49:51,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:51,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150821616] [2022-02-15 13:49:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:51,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:52,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:52,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150821616] [2022-02-15 13:49:52,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150821616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:52,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910962740] [2022-02-15 13:49:52,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:49:52,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:52,068 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:52,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-15 13:49:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:52,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:52,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:49:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:52,729 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:52,730 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:52,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:52,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:52,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910962740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:52,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:52,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:49:52,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71375748] [2022-02-15 13:49:52,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:52,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:49:52,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:49:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:49:52,833 INFO L87 Difference]: Start difference. First operand 2716 states and 6859 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 13:49:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:54,897 INFO L93 Difference]: Finished difference Result 4670 states and 11659 transitions. [2022-02-15 13:49:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:49:54,897 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 30 [2022-02-15 13:49:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:54,903 INFO L225 Difference]: With dead ends: 4670 [2022-02-15 13:49:54,903 INFO L226 Difference]: Without dead ends: 4631 [2022-02-15 13:49:54,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=431, Invalid=3601, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:49:54,904 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 368 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:54,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 352 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:49:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2022-02-15 13:49:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2734. [2022-02-15 13:49:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.525795828759605) internal successors, (6903), 2733 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 6903 transitions. [2022-02-15 13:49:54,935 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 6903 transitions. Word has length 30 [2022-02-15 13:49:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:54,936 INFO L470 AbstractCegarLoop]: Abstraction has 2734 states and 6903 transitions. [2022-02-15 13:49:54,936 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 13:49:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 6903 transitions. [2022-02-15 13:49:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:54,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:54,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:54,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:55,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-15 13:49:55,153 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:55,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1403316116, now seen corresponding path program 56 times [2022-02-15 13:49:55,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:55,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149405376] [2022-02-15 13:49:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:55,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:55,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:55,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149405376] [2022-02-15 13:49:55,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149405376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:55,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961220726] [2022-02-15 13:49:55,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:49:55,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:55,415 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:55,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-15 13:49:55,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:49:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:55,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:55,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:49:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:55,883 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:55,884 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:49:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:55,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:55,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:55,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961220726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:55,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:55,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:49:55,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811775814] [2022-02-15 13:49:55,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:55,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:49:55,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:49:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:49:55,999 INFO L87 Difference]: Start difference. First operand 2734 states and 6903 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:49:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:49:58,534 INFO L93 Difference]: Finished difference Result 5352 states and 13485 transitions. [2022-02-15 13:49:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:49:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:49:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:49:58,542 INFO L225 Difference]: With dead ends: 5352 [2022-02-15 13:49:58,542 INFO L226 Difference]: Without dead ends: 5339 [2022-02-15 13:49:58,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=928, Invalid=6554, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:49:58,543 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:49:58,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 267 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:49:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-02-15 13:49:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 2739. [2022-02-15 13:49:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.525566106647188) internal successors, (6915), 2738 states have internal predecessors, (6915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:49:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 6915 transitions. [2022-02-15 13:49:58,582 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 6915 transitions. Word has length 30 [2022-02-15 13:49:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:49:58,582 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 6915 transitions. [2022-02-15 13:49:58,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:49:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 6915 transitions. [2022-02-15 13:49:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:49:58,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:49:58,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:49:58,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-15 13:49:58,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:58,815 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:49:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:49:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2068519284, now seen corresponding path program 57 times [2022-02-15 13:49:58,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:49:58,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738120760] [2022-02-15 13:49:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:49:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:49:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:49:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:59,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:49:59,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738120760] [2022-02-15 13:49:59,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738120760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:49:59,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475205467] [2022-02-15 13:49:59,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:49:59,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:49:59,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:49:59,011 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:49:59,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-15 13:49:59,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:49:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:49:59,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:49:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:49:59,275 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:49:59,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 37 [2022-02-15 13:49:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:59,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:49:59,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:49:59,563 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:49:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:49:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:49:59,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:49:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:49:59,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475205467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:49:59,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:49:59,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:49:59,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082517911] [2022-02-15 13:49:59,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:49:59,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:49:59,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:49:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:49:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:49:59,631 INFO L87 Difference]: Start difference. First operand 2739 states and 6915 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 13:50:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:01,262 INFO L93 Difference]: Finished difference Result 4965 states and 12544 transitions. [2022-02-15 13:50:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:50:01,263 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 30 [2022-02-15 13:50:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:01,269 INFO L225 Difference]: With dead ends: 4965 [2022-02-15 13:50:01,269 INFO L226 Difference]: Without dead ends: 4938 [2022-02-15 13:50:01,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=564, Invalid=4128, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:50:01,269 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 411 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:01,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 285 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-02-15 13:50:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 2738. [2022-02-15 13:50:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 2.525392765801973) internal successors, (6912), 2737 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 6912 transitions. [2022-02-15 13:50:01,306 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 6912 transitions. Word has length 30 [2022-02-15 13:50:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 6912 transitions. [2022-02-15 13:50:01,306 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 13:50:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 6912 transitions. [2022-02-15 13:50:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:01,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:01,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:01,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:01,524 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:01,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1228194702, now seen corresponding path program 58 times [2022-02-15 13:50:01,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:01,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288165233] [2022-02-15 13:50:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:01,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:01,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:01,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288165233] [2022-02-15 13:50:01,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288165233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:01,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852766716] [2022-02-15 13:50:01,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:50:01,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:01,722 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:01,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-15 13:50:01,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:50:01,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:01,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:01,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:50:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:01,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:02,146 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:02,146 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:02,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:02,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:02,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:02,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:02,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852766716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:02,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:02,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:50:02,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586658658] [2022-02-15 13:50:02,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:02,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:50:02,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:50:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:50:02,212 INFO L87 Difference]: Start difference. First operand 2738 states and 6912 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:03,509 INFO L93 Difference]: Finished difference Result 4487 states and 11228 transitions. [2022-02-15 13:50:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:50:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:50:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:03,514 INFO L225 Difference]: With dead ends: 4487 [2022-02-15 13:50:03,514 INFO L226 Difference]: Without dead ends: 4460 [2022-02-15 13:50:03,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:50:03,515 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 335 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:03,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 267 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-02-15 13:50:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 2723. [2022-02-15 13:50:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2722 states have (on average 2.527185892725937) internal successors, (6879), 2722 states have internal predecessors, (6879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 6879 transitions. [2022-02-15 13:50:03,547 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 6879 transitions. Word has length 30 [2022-02-15 13:50:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:03,547 INFO L470 AbstractCegarLoop]: Abstraction has 2723 states and 6879 transitions. [2022-02-15 13:50:03,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 6879 transitions. [2022-02-15 13:50:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:03,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:03,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:03,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-02-15 13:50:03,763 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -451058140, now seen corresponding path program 59 times [2022-02-15 13:50:03,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:03,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552584292] [2022-02-15 13:50:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:03,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:03,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:03,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552584292] [2022-02-15 13:50:03,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552584292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:03,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559093840] [2022-02-15 13:50:03,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:50:03,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:03,958 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:03,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-15 13:50:03,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:50:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:03,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:04,220 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:50:04,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-15 13:50:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:04,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:04,457 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:04,458 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:04,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:04,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559093840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:04,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:04,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:50:04,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426502764] [2022-02-15 13:50:04,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:50:04,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:50:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:50:04,517 INFO L87 Difference]: Start difference. First operand 2723 states and 6879 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 13:50:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:05,526 INFO L93 Difference]: Finished difference Result 4430 states and 11112 transitions. [2022-02-15 13:50:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:50:05,526 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 30 [2022-02-15 13:50:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:05,531 INFO L225 Difference]: With dead ends: 4430 [2022-02-15 13:50:05,531 INFO L226 Difference]: Without dead ends: 4421 [2022-02-15 13:50:05,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:50:05,532 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 350 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:05,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 346 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:50:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-02-15 13:50:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 2725. [2022-02-15 13:50:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 2.526431718061674) internal successors, (6882), 2724 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 6882 transitions. [2022-02-15 13:50:05,563 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 6882 transitions. Word has length 30 [2022-02-15 13:50:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 6882 transitions. [2022-02-15 13:50:05,563 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 13:50:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 6882 transitions. [2022-02-15 13:50:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:05,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:05,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:05,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:05,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:05,782 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1218938786, now seen corresponding path program 39 times [2022-02-15 13:50:05,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:05,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553215149] [2022-02-15 13:50:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:05,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:06,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:06,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553215149] [2022-02-15 13:50:06,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553215149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:06,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646819149] [2022-02-15 13:50:06,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:50:06,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:06,026 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-15 13:50:06,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:50:06,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:06,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:50:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:06,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:50:06,329 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 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-15 13:50:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:06,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:07,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:07,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:50:07,142 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:50:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:07,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646819149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:07,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:07,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-15 13:50:07,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996420185] [2022-02-15 13:50:07,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:07,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:50:07,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:50:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:50:07,213 INFO L87 Difference]: Start difference. First operand 2725 states and 6882 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 13:50:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:09,649 INFO L93 Difference]: Finished difference Result 5411 states and 13692 transitions. [2022-02-15 13:50:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:50:09,649 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 30 [2022-02-15 13:50:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:09,656 INFO L225 Difference]: With dead ends: 5411 [2022-02-15 13:50:09,657 INFO L226 Difference]: Without dead ends: 5380 [2022-02-15 13:50:09,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=983, Invalid=5337, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:50:09,658 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 233 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:09,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 251 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1176 Invalid, 0 Unknown, 1015 Unchecked, 0.5s Time] [2022-02-15 13:50:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-02-15 13:50:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 2744. [2022-02-15 13:50:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.5264309150565074) internal successors, (6930), 2743 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 6930 transitions. [2022-02-15 13:50:09,694 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 6930 transitions. Word has length 30 [2022-02-15 13:50:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:09,694 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 6930 transitions. [2022-02-15 13:50:09,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 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 13:50:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 6930 transitions. [2022-02-15 13:50:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:09,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:09,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:09,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:09,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:09,911 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash 598451650, now seen corresponding path program 40 times [2022-02-15 13:50:09,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:09,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618712928] [2022-02-15 13:50:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:10,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:10,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618712928] [2022-02-15 13:50:10,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618712928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:10,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859431477] [2022-02-15 13:50:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:50:10,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:10,227 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:10,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-15 13:50:10,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:50:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:10,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:10,569 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:50:10,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 48 [2022-02-15 13:50:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:10,889 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:10,890 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:10,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:10,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:10,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859431477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:10,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:10,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:10,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222123782] [2022-02-15 13:50:10,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:10,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:10,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:10,988 INFO L87 Difference]: Start difference. First operand 2744 states and 6930 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:13,820 INFO L93 Difference]: Finished difference Result 5511 states and 13878 transitions. [2022-02-15 13:50:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 13:50:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:50:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:13,828 INFO L225 Difference]: With dead ends: 5511 [2022-02-15 13:50:13,828 INFO L226 Difference]: Without dead ends: 5480 [2022-02-15 13:50:13,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1122, Invalid=8190, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 13:50:13,829 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 440 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:13,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 283 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:50:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-02-15 13:50:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 2774. [2022-02-15 13:50:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.5279480706815725) internal successors, (7010), 2773 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 7010 transitions. [2022-02-15 13:50:13,866 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 7010 transitions. Word has length 30 [2022-02-15 13:50:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:13,866 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 7010 transitions. [2022-02-15 13:50:13,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 7010 transitions. [2022-02-15 13:50:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:13,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:13,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:14,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:14,080 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1263654818, now seen corresponding path program 41 times [2022-02-15 13:50:14,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:14,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421790809] [2022-02-15 13:50:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:14,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:14,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421790809] [2022-02-15 13:50:14,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421790809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929094038] [2022-02-15 13:50:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:50:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:14,377 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:14,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-15 13:50:14,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:50:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:14,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:14,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:14,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:14,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:14,993 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:15,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:15,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:15,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929094038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:15,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:15,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:50:15,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354917539] [2022-02-15 13:50:15,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:15,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:50:15,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:50:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:50:15,092 INFO L87 Difference]: Start difference. First operand 2774 states and 7010 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 13:50:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:17,538 INFO L93 Difference]: Finished difference Result 4774 states and 12066 transitions. [2022-02-15 13:50:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:50:17,538 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 30 [2022-02-15 13:50:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:17,545 INFO L225 Difference]: With dead ends: 4774 [2022-02-15 13:50:17,545 INFO L226 Difference]: Without dead ends: 4750 [2022-02-15 13:50:17,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=626, Invalid=4924, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:50:17,546 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 321 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:17,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 190 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:50:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2022-02-15 13:50:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 2774. [2022-02-15 13:50:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.5268662098809953) internal successors, (7007), 2773 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 7007 transitions. [2022-02-15 13:50:17,583 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 7007 transitions. Word has length 30 [2022-02-15 13:50:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:17,583 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 7007 transitions. [2022-02-15 13:50:17,583 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 13:50:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 7007 transitions. [2022-02-15 13:50:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:17,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:17,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:17,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:17,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-15 13:50:17,799 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1685984356, now seen corresponding path program 42 times [2022-02-15 13:50:17,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:17,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085077723] [2022-02-15 13:50:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:17,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:18,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085077723] [2022-02-15 13:50:18,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085077723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811626734] [2022-02-15 13:50:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:50:18,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:18,005 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-15 13:50:18,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:50:18,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:18,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:50:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:18,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:18,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:50:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:18,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:18,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:50:18,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:50:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:19,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811626734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:19,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:19,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-15 13:50:19,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720141942] [2022-02-15 13:50:19,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:19,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:50:19,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:50:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:50:19,002 INFO L87 Difference]: Start difference. First operand 2774 states and 7007 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 13:50:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:19,849 INFO L93 Difference]: Finished difference Result 3682 states and 9259 transitions. [2022-02-15 13:50:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:50:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 30 [2022-02-15 13:50:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:19,854 INFO L225 Difference]: With dead ends: 3682 [2022-02-15 13:50:19,854 INFO L226 Difference]: Without dead ends: 3671 [2022-02-15 13:50:19,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:50:19,855 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 883 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:19,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 140 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 734 Invalid, 0 Unknown, 883 Unchecked, 0.3s Time] [2022-02-15 13:50:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2022-02-15 13:50:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2786. [2022-02-15 13:50:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 2.526391382405745) internal successors, (7036), 2785 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 7036 transitions. [2022-02-15 13:50:19,886 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 7036 transitions. Word has length 30 [2022-02-15 13:50:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:19,886 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 7036 transitions. [2022-02-15 13:50:19,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 13:50:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 7036 transitions. [2022-02-15 13:50:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:19,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:19,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:19,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:20,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:20,100 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash -852581890, now seen corresponding path program 43 times [2022-02-15 13:50:20,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:20,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134446939] [2022-02-15 13:50:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:20,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:20,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:20,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134446939] [2022-02-15 13:50:20,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134446939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:20,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445110355] [2022-02-15 13:50:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:50:20,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:20,378 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:20,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-15 13:50:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:20,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:20,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:20,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:21,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:21,045 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:21,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:21,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445110355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:21,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:21,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:50:21,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066327811] [2022-02-15 13:50:21,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:21,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:50:21,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:50:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:50:21,146 INFO L87 Difference]: Start difference. First operand 2786 states and 7036 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:22,903 INFO L93 Difference]: Finished difference Result 4597 states and 11655 transitions. [2022-02-15 13:50:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:50:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:50:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:22,911 INFO L225 Difference]: With dead ends: 4597 [2022-02-15 13:50:22,911 INFO L226 Difference]: Without dead ends: 4583 [2022-02-15 13:50:22,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:50:22,912 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:22,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 174 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:50:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2022-02-15 13:50:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 2793. [2022-02-15 13:50:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 2.525787965616046) internal successors, (7052), 2792 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 7052 transitions. [2022-02-15 13:50:22,960 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 7052 transitions. Word has length 30 [2022-02-15 13:50:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:22,961 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 7052 transitions. [2022-02-15 13:50:22,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 7052 transitions. [2022-02-15 13:50:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:22,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:22,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:22,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:23,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:23,180 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -317137682, now seen corresponding path program 44 times [2022-02-15 13:50:23,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:23,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432655147] [2022-02-15 13:50:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:23,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:23,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:23,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432655147] [2022-02-15 13:50:23,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432655147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:23,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112591626] [2022-02-15 13:50:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:50:23,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:23,423 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:23,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-15 13:50:23,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:50:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:23,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:23,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:23,975 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:23,975 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:24,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:24,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:24,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:24,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112591626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:24,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:24,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:50:24,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651762394] [2022-02-15 13:50:24,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:24,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:50:24,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:50:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:50:24,060 INFO L87 Difference]: Start difference. First operand 2793 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:50:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:25,776 INFO L93 Difference]: Finished difference Result 4632 states and 11704 transitions. [2022-02-15 13:50:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:50:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:50:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:25,783 INFO L225 Difference]: With dead ends: 4632 [2022-02-15 13:50:25,784 INFO L226 Difference]: Without dead ends: 4622 [2022-02-15 13:50:25,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=3165, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:50:25,784 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 244 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:25,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 256 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:50:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4622 states. [2022-02-15 13:50:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4622 to 2792. [2022-02-15 13:50:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.525976352561806) internal successors, (7050), 2791 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 7050 transitions. [2022-02-15 13:50:25,835 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 7050 transitions. Word has length 30 [2022-02-15 13:50:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:25,835 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 7050 transitions. [2022-02-15 13:50:25,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:50:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 7050 transitions. [2022-02-15 13:50:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:25,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:25,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:25,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:26,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-02-15 13:50:26,053 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1994859392, now seen corresponding path program 45 times [2022-02-15 13:50:26,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:26,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541123175] [2022-02-15 13:50:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:26,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:26,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:26,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541123175] [2022-02-15 13:50:26,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541123175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:26,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989082035] [2022-02-15 13:50:26,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:50:26,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:26,357 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:26,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-15 13:50:26,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:50:26,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:26,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:26,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:26,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:26,916 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:26,916 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:26,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:26,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:27,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989082035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:27,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:27,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:50:27,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380518507] [2022-02-15 13:50:27,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:27,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:50:27,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:50:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:50:27,010 INFO L87 Difference]: Start difference. First operand 2792 states and 7050 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 13:50:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:29,823 INFO L93 Difference]: Finished difference Result 5831 states and 14848 transitions. [2022-02-15 13:50:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:50:29,824 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 30 [2022-02-15 13:50:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:29,831 INFO L225 Difference]: With dead ends: 5831 [2022-02-15 13:50:29,831 INFO L226 Difference]: Without dead ends: 5804 [2022-02-15 13:50:29,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=838, Invalid=5968, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:50:29,832 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 389 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:29,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 249 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:50:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2022-02-15 13:50:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2788. [2022-02-15 13:50:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.5260136347326876) internal successors, (7040), 2787 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7040 transitions. [2022-02-15 13:50:29,873 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7040 transitions. Word has length 30 [2022-02-15 13:50:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:29,873 INFO L470 AbstractCegarLoop]: Abstraction has 2788 states and 7040 transitions. [2022-02-15 13:50:29,873 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 13:50:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7040 transitions. [2022-02-15 13:50:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:29,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:29,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:29,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-15 13:50:30,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:30,091 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1892064022, now seen corresponding path program 46 times [2022-02-15 13:50:30,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:30,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83830025] [2022-02-15 13:50:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:30,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:30,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:30,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83830025] [2022-02-15 13:50:30,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83830025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:30,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016828803] [2022-02-15 13:50:30,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:50:30,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:30,403 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:30,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-15 13:50:30,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:50:30,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:30,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:30,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:30,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:50:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:30,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:30,975 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:30,975 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:31,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:31,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016828803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:31,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:31,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:31,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786836629] [2022-02-15 13:50:31,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:31,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:31,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:31,049 INFO L87 Difference]: Start difference. First operand 2788 states and 7040 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:32,849 INFO L93 Difference]: Finished difference Result 4640 states and 11634 transitions. [2022-02-15 13:50:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:50:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:50:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:32,855 INFO L225 Difference]: With dead ends: 4640 [2022-02-15 13:50:32,855 INFO L226 Difference]: Without dead ends: 4609 [2022-02-15 13:50:32,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=4422, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:50:32,856 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 413 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:32,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 313 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:50:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2022-02-15 13:50:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 2757. [2022-02-15 13:50:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-15 13:50:32,895 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-15 13:50:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:32,896 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-15 13:50:32,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-15 13:50:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:32,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:32,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:32,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:33,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:33,114 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash 919510156, now seen corresponding path program 47 times [2022-02-15 13:50:33,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:33,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975158675] [2022-02-15 13:50:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:33,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:33,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975158675] [2022-02-15 13:50:33,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975158675] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:33,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124684666] [2022-02-15 13:50:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:50:33,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:33,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:33,403 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:33,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-15 13:50:33,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:50:33,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:33,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:33,782 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:50:33,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2022-02-15 13:50:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:33,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:34,036 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:34,036 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:34,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:34,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:34,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:34,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:34,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124684666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:34,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:34,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:34,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757075134] [2022-02-15 13:50:34,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:34,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:34,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:34,106 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:35,805 INFO L93 Difference]: Finished difference Result 4898 states and 12232 transitions. [2022-02-15 13:50:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:50:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:50:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:35,812 INFO L225 Difference]: With dead ends: 4898 [2022-02-15 13:50:35,812 INFO L226 Difference]: Without dead ends: 4869 [2022-02-15 13:50:35,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=473, Invalid=3817, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:50:35,813 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 359 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:35,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 353 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:50:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2022-02-15 13:50:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 2775. [2022-02-15 13:50:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 2.526315789473684) internal successors, (7008), 2774 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 7008 transitions. [2022-02-15 13:50:35,849 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 7008 transitions. Word has length 30 [2022-02-15 13:50:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 7008 transitions. [2022-02-15 13:50:35,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 7008 transitions. [2022-02-15 13:50:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:35,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:35,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:35,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:36,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:36,067 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1193181894, now seen corresponding path program 48 times [2022-02-15 13:50:36,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:36,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964100912] [2022-02-15 13:50:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:36,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:36,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:36,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964100912] [2022-02-15 13:50:36,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964100912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:36,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756907514] [2022-02-15 13:50:36,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:50:36,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:36,416 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:36,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-15 13:50:36,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:50:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:36,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:36,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:36,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:36,981 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:37,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:37,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:37,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:37,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756907514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:37,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:37,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:37,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769259371] [2022-02-15 13:50:37,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:37,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:37,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:37,046 INFO L87 Difference]: Start difference. First operand 2775 states and 7008 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:38,734 INFO L93 Difference]: Finished difference Result 5569 states and 14038 transitions. [2022-02-15 13:50:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:50:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:50:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:38,741 INFO L225 Difference]: With dead ends: 5569 [2022-02-15 13:50:38,741 INFO L226 Difference]: Without dead ends: 5550 [2022-02-15 13:50:38,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=762, Invalid=5244, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:50:38,742 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 442 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:38,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 231 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:50:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2022-02-15 13:50:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 2757. [2022-02-15 13:50:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-15 13:50:38,803 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-15 13:50:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-15 13:50:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-15 13:50:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:38,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:38,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:38,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:39,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:39,021 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:39,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1858385062, now seen corresponding path program 49 times [2022-02-15 13:50:39,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:39,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115288931] [2022-02-15 13:50:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:39,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:39,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:39,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115288931] [2022-02-15 13:50:39,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115288931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:39,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365410669] [2022-02-15 13:50:39,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:50:39,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:39,216 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:39,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-15 13:50:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:39,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:39,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:39,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:39,793 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:39,794 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:39,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:39,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:39,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365410669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:39,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:39,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:50:39,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032366091] [2022-02-15 13:50:39,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:39,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:50:39,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:50:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:50:39,859 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 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 13:50:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:41,275 INFO L93 Difference]: Finished difference Result 4903 states and 12395 transitions. [2022-02-15 13:50:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:50:41,275 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 30 [2022-02-15 13:50:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:41,281 INFO L225 Difference]: With dead ends: 4903 [2022-02-15 13:50:41,281 INFO L226 Difference]: Without dead ends: 4880 [2022-02-15 13:50:41,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=488, Invalid=3672, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:50:41,282 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 317 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:41,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 217 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2022-02-15 13:50:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 2760. [2022-02-15 13:50:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.5255527364987316) internal successors, (6968), 2759 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6968 transitions. [2022-02-15 13:50:41,317 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6968 transitions. Word has length 30 [2022-02-15 13:50:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:41,317 INFO L470 AbstractCegarLoop]: Abstraction has 2760 states and 6968 transitions. [2022-02-15 13:50:41,317 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 13:50:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6968 transitions. [2022-02-15 13:50:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:41,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:41,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:41,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-15 13:50:41,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:41,535 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash 607621852, now seen corresponding path program 50 times [2022-02-15 13:50:41,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:41,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108891279] [2022-02-15 13:50:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:41,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:41,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:41,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108891279] [2022-02-15 13:50:41,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108891279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:41,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402337692] [2022-02-15 13:50:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:50:41,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:41,848 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:41,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-15 13:50:41,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:50:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:41,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:42,250 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:50:42,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 45 [2022-02-15 13:50:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:42,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:42,573 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:42,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:42,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:50:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:42,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402337692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:42,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:42,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:42,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943437466] [2022-02-15 13:50:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:42,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:42,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:42,677 INFO L87 Difference]: Start difference. First operand 2760 states and 6968 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:44,088 INFO L93 Difference]: Finished difference Result 4661 states and 11697 transitions. [2022-02-15 13:50:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:50:44,088 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:50:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:44,094 INFO L225 Difference]: With dead ends: 4661 [2022-02-15 13:50:44,094 INFO L226 Difference]: Without dead ends: 4650 [2022-02-15 13:50:44,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:50:44,095 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 294 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:44,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 368 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:50:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2022-02-15 13:50:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 2757. [2022-02-15 13:50:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-15 13:50:44,130 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-15 13:50:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:44,130 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-15 13:50:44,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-15 13:50:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:44,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:44,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:44,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-15 13:50:44,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-15 13:50:44,339 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1532961490, now seen corresponding path program 60 times [2022-02-15 13:50:44,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:44,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556389754] [2022-02-15 13:50:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:44,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:44,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:44,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556389754] [2022-02-15 13:50:44,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556389754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:44,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144835643] [2022-02-15 13:50:44,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:50:44,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:44,558 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:44,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-15 13:50:44,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:50:44,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:44,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:50:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:44,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:44,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:45,019 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:45,019 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:45,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:45,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:45,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144835643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:45,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:45,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:45,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658578028] [2022-02-15 13:50:45,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:45,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:45,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:45,097 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:46,135 INFO L93 Difference]: Finished difference Result 4669 states and 11728 transitions. [2022-02-15 13:50:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:50:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:50:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:46,141 INFO L225 Difference]: With dead ends: 4669 [2022-02-15 13:50:46,141 INFO L226 Difference]: Without dead ends: 4660 [2022-02-15 13:50:46,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:50:46,141 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 406 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:46,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 317 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2022-02-15 13:50:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 2757. [2022-02-15 13:50:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-15 13:50:46,175 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-15 13:50:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:46,175 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-15 13:50:46,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-15 13:50:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:46,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:46,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:46,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-15 13:50:46,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-15 13:50:46,379 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1924582932, now seen corresponding path program 61 times [2022-02-15 13:50:46,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:46,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176277194] [2022-02-15 13:50:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:46,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:46,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:46,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176277194] [2022-02-15 13:50:46,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176277194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:46,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142074672] [2022-02-15 13:50:46,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:50:46,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:46,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:46,659 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:46,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-15 13:50:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:46,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:47,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:50:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:47,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:47,315 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:47,316 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:47,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:47,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:47,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:47,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142074672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:47,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:47,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:47,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266720925] [2022-02-15 13:50:47,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:47,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:47,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:47,434 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:48,950 INFO L93 Difference]: Finished difference Result 4779 states and 11972 transitions. [2022-02-15 13:50:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:50:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:50:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:48,957 INFO L225 Difference]: With dead ends: 4779 [2022-02-15 13:50:48,957 INFO L226 Difference]: Without dead ends: 4754 [2022-02-15 13:50:48,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:50:48,957 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 384 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:48,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 364 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:50:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-02-15 13:50:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 2775. [2022-02-15 13:50:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 2.525234318673396) internal successors, (7005), 2774 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 7005 transitions. [2022-02-15 13:50:49,019 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 7005 transitions. Word has length 30 [2022-02-15 13:50:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:49,019 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 7005 transitions. [2022-02-15 13:50:49,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 7005 transitions. [2022-02-15 13:50:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:49,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:49,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:49,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-15 13:50:49,238 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1821367144, now seen corresponding path program 62 times [2022-02-15 13:50:49,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:49,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399386104] [2022-02-15 13:50:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:49,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:49,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:49,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399386104] [2022-02-15 13:50:49,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399386104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:49,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076291731] [2022-02-15 13:50:49,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:50:49,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:49,530 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:49,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-15 13:50:49,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:50:49,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:49,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:49,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:49,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:50:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:49,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:50,079 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:50,079 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:50,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:50,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076291731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:50,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:50,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:50,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035966324] [2022-02-15 13:50:50,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:50,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:50,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:50,198 INFO L87 Difference]: Start difference. First operand 2775 states and 7005 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:51,786 INFO L93 Difference]: Finished difference Result 5311 states and 13373 transitions. [2022-02-15 13:50:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:50:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:50:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:51,794 INFO L225 Difference]: With dead ends: 5311 [2022-02-15 13:50:51,794 INFO L226 Difference]: Without dead ends: 5298 [2022-02-15 13:50:51,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:50:51,794 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 376 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:51,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 226 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:50:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2022-02-15 13:50:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 2780. [2022-02-15 13:50:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 2.5250089960417417) internal successors, (7017), 2779 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 7017 transitions. [2022-02-15 13:50:51,834 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 7017 transitions. Word has length 30 [2022-02-15 13:50:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:51,834 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 7017 transitions. [2022-02-15 13:50:51,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:50:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 7017 transitions. [2022-02-15 13:50:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:51,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:51,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:51,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:52,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:52,038 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1808396984, now seen corresponding path program 63 times [2022-02-15 13:50:52,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:52,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379466724] [2022-02-15 13:50:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:52,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:52,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379466724] [2022-02-15 13:50:52,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379466724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:52,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760864978] [2022-02-15 13:50:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:50:52,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:52,262 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:52,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-15 13:50:52,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:50:52,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:52,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:52,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:50:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:52,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:52,816 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:52,816 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:50:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:52,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:52,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760864978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:52,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:52,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:52,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929782253] [2022-02-15 13:50:52,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:52,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:52,906 INFO L87 Difference]: Start difference. First operand 2780 states and 7017 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:54,198 INFO L93 Difference]: Finished difference Result 4559 states and 11490 transitions. [2022-02-15 13:50:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:50:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:50:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:54,204 INFO L225 Difference]: With dead ends: 4559 [2022-02-15 13:50:54,204 INFO L226 Difference]: Without dead ends: 4542 [2022-02-15 13:50:54,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:50:54,205 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 354 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:54,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 305 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-02-15 13:50:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2779. [2022-02-15 13:50:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 2.524838012958963) internal successors, (7014), 2778 states have internal predecessors, (7014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 7014 transitions. [2022-02-15 13:50:54,241 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 7014 transitions. Word has length 30 [2022-02-15 13:50:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:54,241 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 7014 transitions. [2022-02-15 13:50:54,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 7014 transitions. [2022-02-15 13:50:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:54,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:54,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:54,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:54,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:54,455 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -810143674, now seen corresponding path program 64 times [2022-02-15 13:50:54,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:54,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317989180] [2022-02-15 13:50:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:54,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:54,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:54,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317989180] [2022-02-15 13:50:54,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317989180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:54,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597371051] [2022-02-15 13:50:54,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:50:54,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:54,687 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:54,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-15 13:50:54,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:50:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:54,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:54,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:50:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:54,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:55,147 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:55,147 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:55,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:55,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:55,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597371051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:55,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:55,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:55,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050975474] [2022-02-15 13:50:55,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:55,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:55,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:55,223 INFO L87 Difference]: Start difference. First operand 2779 states and 7014 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:56,529 INFO L93 Difference]: Finished difference Result 4720 states and 11828 transitions. [2022-02-15 13:50:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:50:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:50:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:56,535 INFO L225 Difference]: With dead ends: 4720 [2022-02-15 13:50:56,535 INFO L226 Difference]: Without dead ends: 4701 [2022-02-15 13:50:56,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:50:56,536 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 389 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 276 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:50:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2022-02-15 13:50:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 2760. [2022-02-15 13:50:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.5255527364987316) internal successors, (6968), 2759 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6968 transitions. [2022-02-15 13:50:56,568 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6968 transitions. Word has length 30 [2022-02-15 13:50:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 2760 states and 6968 transitions. [2022-02-15 13:50:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:50:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6968 transitions. [2022-02-15 13:50:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:56,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:56,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:56,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-15 13:50:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:56,786 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1564145080, now seen corresponding path program 65 times [2022-02-15 13:50:56,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:56,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990956362] [2022-02-15 13:50:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:50:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:57,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:50:57,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990956362] [2022-02-15 13:50:57,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990956362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:50:57,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727484946] [2022-02-15 13:50:57,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:50:57,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:50:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:50:57,096 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:50:57,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-15 13:50:57,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:50:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:50:57,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:50:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:50:57,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:50:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:57,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:50:57,789 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:50:57,789 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:50:57,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:57,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:50:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:50:57,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:50:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:50:57,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727484946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:50:57,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:50:57,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:50:57,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204843644] [2022-02-15 13:50:57,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:50:57,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:50:57,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:50:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:50:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:50:57,910 INFO L87 Difference]: Start difference. First operand 2760 states and 6968 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:50:59,657 INFO L93 Difference]: Finished difference Result 4637 states and 11651 transitions. [2022-02-15 13:50:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:50:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:50:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:50:59,664 INFO L225 Difference]: With dead ends: 4637 [2022-02-15 13:50:59,664 INFO L226 Difference]: Without dead ends: 4628 [2022-02-15 13:50:59,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:50:59,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 2962 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:50:59,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 410 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2962 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:50:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2022-02-15 13:50:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 2757. [2022-02-15 13:50:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:50:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-15 13:50:59,698 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-15 13:50:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:50:59,698 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-15 13:50:59,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:50:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-15 13:50:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:50:59,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:50:59,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:50:59,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-15 13:50:59,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-02-15 13:50:59,917 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:50:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:50:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1713384816, now seen corresponding path program 66 times [2022-02-15 13:50:59,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:50:59,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496455131] [2022-02-15 13:50:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:50:59,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:50:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:00,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:00,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496455131] [2022-02-15 13:51:00,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496455131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:00,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474839945] [2022-02-15 13:51:00,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:00,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:00,201 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:00,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-15 13:51:00,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:51:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:00,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:51:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:00,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:00,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-02-15 13:51:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:00,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:01,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:01,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-15 13:51:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:01,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474839945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:01,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:01,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-02-15 13:51:01,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129174489] [2022-02-15 13:51:01,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:01,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:51:01,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:01,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:51:01,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:51:01,232 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 13:51:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:08,082 INFO L93 Difference]: Finished difference Result 5140 states and 12873 transitions. [2022-02-15 13:51:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 13:51:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 30 [2022-02-15 13:51:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:08,089 INFO L225 Difference]: With dead ends: 5140 [2022-02-15 13:51:08,089 INFO L226 Difference]: Without dead ends: 5095 [2022-02-15 13:51:08,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 40 SyntacticMatches, 18 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2311, Invalid=9899, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:51:08,090 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 649 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1908 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:08,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 278 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1263 Invalid, 0 Unknown, 1908 Unchecked, 0.8s Time] [2022-02-15 13:51:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2022-02-15 13:51:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 2832. [2022-02-15 13:51:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.5305545743553512) internal successors, (7164), 2831 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 7164 transitions. [2022-02-15 13:51:08,124 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 7164 transitions. Word has length 30 [2022-02-15 13:51:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 7164 transitions. [2022-02-15 13:51:08,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 13:51:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 7164 transitions. [2022-02-15 13:51:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:08,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:08,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:08,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:08,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:08,342 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash -937613392, now seen corresponding path program 67 times [2022-02-15 13:51:08,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:08,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55214623] [2022-02-15 13:51:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:08,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:08,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:08,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55214623] [2022-02-15 13:51:08,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55214623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:08,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139317256] [2022-02-15 13:51:08,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:08,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:08,630 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:08,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-15 13:51:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:08,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:08,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:51:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:09,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:09,303 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:09,303 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:09,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:09,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:09,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139317256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:09,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:09,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:51:09,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243001959] [2022-02-15 13:51:09,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:09,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:51:09,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:09,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:51:09,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:09,423 INFO L87 Difference]: Start difference. First operand 2832 states and 7164 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:51:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:12,042 INFO L93 Difference]: Finished difference Result 5490 states and 13824 transitions. [2022-02-15 13:51:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:51:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:51:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:12,049 INFO L225 Difference]: With dead ends: 5490 [2022-02-15 13:51:12,049 INFO L226 Difference]: Without dead ends: 5475 [2022-02-15 13:51:12,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1080, Invalid=6752, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:51:12,050 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 581 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:12,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 179 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:51:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-02-15 13:51:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 2847. [2022-02-15 13:51:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.530217849613493) internal successors, (7201), 2846 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7201 transitions. [2022-02-15 13:51:12,093 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7201 transitions. Word has length 30 [2022-02-15 13:51:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:12,093 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7201 transitions. [2022-02-15 13:51:12,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:51:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7201 transitions. [2022-02-15 13:51:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:12,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:12,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:12,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:12,300 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -272410224, now seen corresponding path program 68 times [2022-02-15 13:51:12,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:12,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329129362] [2022-02-15 13:51:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:12,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:12,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:12,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329129362] [2022-02-15 13:51:12,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329129362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:12,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938390568] [2022-02-15 13:51:12,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:12,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:12,523 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:12,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-15 13:51:12,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:12,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:12,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:51:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:12,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:13,046 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:13,046 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:51:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:13,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:13,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938390568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:13,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:13,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:51:13,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501671703] [2022-02-15 13:51:13,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:13,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:51:13,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:51:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:13,139 INFO L87 Difference]: Start difference. First operand 2847 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:51:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:15,028 INFO L93 Difference]: Finished difference Result 4750 states and 11976 transitions. [2022-02-15 13:51:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:51:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:51:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:15,035 INFO L225 Difference]: With dead ends: 4750 [2022-02-15 13:51:15,035 INFO L226 Difference]: Without dead ends: 4731 [2022-02-15 13:51:15,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=574, Invalid=3586, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:51:15,036 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 466 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:15,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 234 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:51:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-02-15 13:51:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2847. [2022-02-15 13:51:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.52986647926915) internal successors, (7200), 2846 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 13:51:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7200 transitions. [2022-02-15 13:51:15,072 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7200 transitions. Word has length 30 [2022-02-15 13:51:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:15,072 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7200 transitions. [2022-02-15 13:51:15,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:51:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7200 transitions. [2022-02-15 13:51:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:15,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:15,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:15,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:15,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:15,291 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 725843086, now seen corresponding path program 69 times [2022-02-15 13:51:15,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:15,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151026889] [2022-02-15 13:51:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:15,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:15,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:15,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151026889] [2022-02-15 13:51:15,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151026889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:15,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207134891] [2022-02-15 13:51:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:15,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:15,577 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:15,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-15 13:51:15,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:51:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:15,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:15,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-15 13:51:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:16,124 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:16,124 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:16,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:16,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207134891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:16,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:16,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:51:16,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946063076] [2022-02-15 13:51:16,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:16,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:51:16,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:51:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:16,213 INFO L87 Difference]: Start difference. First operand 2847 states and 7200 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:51:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:18,311 INFO L93 Difference]: Finished difference Result 4704 states and 11815 transitions. [2022-02-15 13:51:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:51:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:51:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:18,317 INFO L225 Difference]: With dead ends: 4704 [2022-02-15 13:51:18,318 INFO L226 Difference]: Without dead ends: 4677 [2022-02-15 13:51:18,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=534, Invalid=3626, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:51:18,318 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 444 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:18,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 244 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:51:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2022-02-15 13:51:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 2835. [2022-02-15 13:51:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2834 states have (on average 2.5303458009880027) internal successors, (7171), 2834 states have internal predecessors, (7171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 7171 transitions. [2022-02-15 13:51:18,376 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 7171 transitions. Word has length 30 [2022-02-15 13:51:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:18,376 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 7171 transitions. [2022-02-15 13:51:18,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:51:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 7171 transitions. [2022-02-15 13:51:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:18,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:18,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:18,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:18,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:18,594 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash 335737166, now seen corresponding path program 70 times [2022-02-15 13:51:18,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:18,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546795450] [2022-02-15 13:51:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:18,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:18,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:18,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546795450] [2022-02-15 13:51:18,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546795450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:18,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167022811] [2022-02-15 13:51:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:18,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:18,826 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:18,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-15 13:51:18,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:18,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:18,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:19,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:51:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:19,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:19,340 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:19,340 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:19,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:19,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:19,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167022811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:19,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:19,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:51:19,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135832364] [2022-02-15 13:51:19,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:19,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:51:19,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:51:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:51:19,428 INFO L87 Difference]: Start difference. First operand 2835 states and 7171 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 13:51:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:22,376 INFO L93 Difference]: Finished difference Result 5864 states and 14895 transitions. [2022-02-15 13:51:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:51:22,377 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 30 [2022-02-15 13:51:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:22,384 INFO L225 Difference]: With dead ends: 5864 [2022-02-15 13:51:22,384 INFO L226 Difference]: Without dead ends: 5851 [2022-02-15 13:51:22,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=887, Invalid=6423, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:51:22,385 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 400 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:22,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 238 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:51:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2022-02-15 13:51:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 2871. [2022-02-15 13:51:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 2.5310104529616724) internal successors, (7264), 2870 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 7264 transitions. [2022-02-15 13:51:22,424 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 7264 transitions. Word has length 30 [2022-02-15 13:51:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:22,425 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 7264 transitions. [2022-02-15 13:51:22,425 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 13:51:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 7264 transitions. [2022-02-15 13:51:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:22,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:22,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:22,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-15 13:51:22,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-15 13:51:22,642 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2092138216, now seen corresponding path program 71 times [2022-02-15 13:51:22,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:22,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587507431] [2022-02-15 13:51:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:22,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:22,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587507431] [2022-02-15 13:51:22,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587507431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556248676] [2022-02-15 13:51:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:22,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:22,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:22,959 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:22,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-15 13:51:22,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:51:22,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:22,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:22,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:23,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:51:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:23,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:23,491 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:23,491 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:51:23,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:23,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:23,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:23,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556248676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:23,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:23,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-15 13:51:23,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699781606] [2022-02-15 13:51:23,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:23,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:51:23,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:51:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:51:23,566 INFO L87 Difference]: Start difference. First operand 2871 states and 7264 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:51:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:26,324 INFO L93 Difference]: Finished difference Result 5235 states and 13259 transitions. [2022-02-15 13:51:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:51:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 30 [2022-02-15 13:51:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:26,331 INFO L225 Difference]: With dead ends: 5235 [2022-02-15 13:51:26,331 INFO L226 Difference]: Without dead ends: 5198 [2022-02-15 13:51:26,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=947, Invalid=7063, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:51:26,332 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 498 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:26,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 226 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:51:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2022-02-15 13:51:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 2874. [2022-02-15 13:51:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2873 states have (on average 2.5297598329272537) internal successors, (7268), 2873 states have internal predecessors, (7268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 7268 transitions. [2022-02-15 13:51:26,384 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 7268 transitions. Word has length 30 [2022-02-15 13:51:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:26,384 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 7268 transitions. [2022-02-15 13:51:26,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:51:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 7268 transitions. [2022-02-15 13:51:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:26,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:26,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:26,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-15 13:51:26,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-15 13:51:26,605 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -673875012, now seen corresponding path program 72 times [2022-02-15 13:51:26,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:26,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091513762] [2022-02-15 13:51:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:26,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:26,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:26,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091513762] [2022-02-15 13:51:26,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091513762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:26,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470745844] [2022-02-15 13:51:26,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:26,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:26,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:26,828 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:26,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-15 13:51:26,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:51:26,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:26,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:51:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:27,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-02-15 13:51:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:27,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:27,461 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:27,461 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:51:27,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:27,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:27,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470745844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:27,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:27,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-02-15 13:51:27,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159040433] [2022-02-15 13:51:27,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:27,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:51:27,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:51:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:51:27,560 INFO L87 Difference]: Start difference. First operand 2874 states and 7268 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 13:51:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:29,855 INFO L93 Difference]: Finished difference Result 4778 states and 12082 transitions. [2022-02-15 13:51:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:51:29,855 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 30 [2022-02-15 13:51:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:29,862 INFO L225 Difference]: With dead ends: 4778 [2022-02-15 13:51:29,862 INFO L226 Difference]: Without dead ends: 4765 [2022-02-15 13:51:29,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=447, Invalid=3975, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:51:29,862 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 368 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:29,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 293 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:51:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4765 states. [2022-02-15 13:51:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4765 to 2862. [2022-02-15 13:51:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.52953512757777) internal successors, (7237), 2861 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 7237 transitions. [2022-02-15 13:51:29,901 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 7237 transitions. Word has length 30 [2022-02-15 13:51:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:29,901 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 7237 transitions. [2022-02-15 13:51:29,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 13:51:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 7237 transitions. [2022-02-15 13:51:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:29,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:29,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:29,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-15 13:51:30,119 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 400370672, now seen corresponding path program 73 times [2022-02-15 13:51:30,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:30,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414085488] [2022-02-15 13:51:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:30,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:30,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414085488] [2022-02-15 13:51:30,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414085488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:30,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552111880] [2022-02-15 13:51:30,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:30,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:30,367 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:30,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-15 13:51:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:30,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:30,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:51:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:30,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:30,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:30,993 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:31,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:31,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:31,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:31,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:31,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552111880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:31,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:31,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:51:31,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941768747] [2022-02-15 13:51:31,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:51:31,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:51:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:51:31,101 INFO L87 Difference]: Start difference. First operand 2862 states and 7237 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 13:51:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:32,903 INFO L93 Difference]: Finished difference Result 4999 states and 12657 transitions. [2022-02-15 13:51:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:51:32,903 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 30 [2022-02-15 13:51:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:32,910 INFO L225 Difference]: With dead ends: 4999 [2022-02-15 13:51:32,910 INFO L226 Difference]: Without dead ends: 4986 [2022-02-15 13:51:32,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=532, Invalid=3890, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:51:32,911 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:32,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 185 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:51:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2022-02-15 13:51:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 2868. [2022-02-15 13:51:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 2.5291245204046042) internal successors, (7251), 2867 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 7251 transitions. [2022-02-15 13:51:32,952 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 7251 transitions. Word has length 30 [2022-02-15 13:51:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:32,953 INFO L470 AbstractCegarLoop]: Abstraction has 2868 states and 7251 transitions. [2022-02-15 13:51:32,953 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 13:51:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 7251 transitions. [2022-02-15 13:51:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:32,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:32,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:32,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-15 13:51:33,171 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2138195574, now seen corresponding path program 74 times [2022-02-15 13:51:33,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:33,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684503140] [2022-02-15 13:51:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:33,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:33,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684503140] [2022-02-15 13:51:33,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684503140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:33,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893667622] [2022-02-15 13:51:33,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:51:33,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:33,365 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:33,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-15 13:51:33,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:51:33,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:33,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:33,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:51:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:33,807 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:33,807 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:51:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:33,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:33,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893667622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:33,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:33,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-15 13:51:33,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11354008] [2022-02-15 13:51:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:33,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:51:33,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:51:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:51:33,905 INFO L87 Difference]: Start difference. First operand 2868 states and 7251 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:51:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:35,702 INFO L93 Difference]: Finished difference Result 4653 states and 11727 transitions. [2022-02-15 13:51:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:51:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 30 [2022-02-15 13:51:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:35,708 INFO L225 Difference]: With dead ends: 4653 [2022-02-15 13:51:35,709 INFO L226 Difference]: Without dead ends: 4626 [2022-02-15 13:51:35,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=486, Invalid=3674, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:51:35,709 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:35,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 182 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:51:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2022-02-15 13:51:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 2868. [2022-02-15 13:51:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 2.528775723753052) internal successors, (7250), 2867 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 7250 transitions. [2022-02-15 13:51:35,742 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 7250 transitions. Word has length 30 [2022-02-15 13:51:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:35,742 INFO L470 AbstractCegarLoop]: Abstraction has 2868 states and 7250 transitions. [2022-02-15 13:51:35,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:51:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 7250 transitions. [2022-02-15 13:51:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:35,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:35,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:35,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-15 13:51:35,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:35,961 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2024219658, now seen corresponding path program 75 times [2022-02-15 13:51:35,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:35,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701026709] [2022-02-15 13:51:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:35,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:36,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:36,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701026709] [2022-02-15 13:51:36,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701026709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:36,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933779116] [2022-02-15 13:51:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:51:36,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:36,208 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:36,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-15 13:51:36,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:51:36,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:36,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:51:36,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:36,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:36,589 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 3 case distinctions, treesize of input 22 treesize of output 38 [2022-02-15 13:51:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:36,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:37,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:37,250 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-02-15 13:51:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:37,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933779116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:37,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:37,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-02-15 13:51:37,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554946340] [2022-02-15 13:51:37,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:37,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:51:37,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:51:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:51:37,311 INFO L87 Difference]: Start difference. First operand 2868 states and 7250 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 13:51:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:42,332 INFO L93 Difference]: Finished difference Result 6008 states and 15392 transitions. [2022-02-15 13:51:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 13:51:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 30 [2022-02-15 13:51:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:42,339 INFO L225 Difference]: With dead ends: 6008 [2022-02-15 13:51:42,339 INFO L226 Difference]: Without dead ends: 5992 [2022-02-15 13:51:42,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2022, Invalid=10188, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:51:42,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 548 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 962 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:42,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 205 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1536 Invalid, 0 Unknown, 962 Unchecked, 0.8s Time] [2022-02-15 13:51:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2022-02-15 13:51:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 2870. [2022-02-15 13:51:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 2.5287556639944233) internal successors, (7255), 2869 states have internal predecessors, (7255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 7255 transitions. [2022-02-15 13:51:42,377 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 7255 transitions. Word has length 30 [2022-02-15 13:51:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:42,377 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 7255 transitions. [2022-02-15 13:51:42,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 13:51:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 7255 transitions. [2022-02-15 13:51:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:42,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:42,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:42,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:42,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-15 13:51:42,595 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -986189982, now seen corresponding path program 76 times [2022-02-15 13:51:42,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:42,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455641269] [2022-02-15 13:51:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:42,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:42,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:42,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455641269] [2022-02-15 13:51:42,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455641269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:42,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106349543] [2022-02-15 13:51:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:51:42,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:42,827 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:42,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-15 13:51:42,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:51:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:42,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:43,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:51:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:43,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:43,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:43,488 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:43,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:43,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:43,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:43,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106349543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:43,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:43,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:51:43,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804863345] [2022-02-15 13:51:43,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:43,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:51:43,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:51:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:43,594 INFO L87 Difference]: Start difference. First operand 2870 states and 7255 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:51:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:46,377 INFO L93 Difference]: Finished difference Result 5084 states and 12714 transitions. [2022-02-15 13:51:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:51:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:51:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:46,384 INFO L225 Difference]: With dead ends: 5084 [2022-02-15 13:51:46,384 INFO L226 Difference]: Without dead ends: 5042 [2022-02-15 13:51:46,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=562, Invalid=3994, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:51:46,384 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 451 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:46,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 398 Invalid, 3573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3321 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 13:51:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2022-02-15 13:51:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 2885. [2022-02-15 13:51:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.5270457697642166) internal successors, (7288), 2884 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 7288 transitions. [2022-02-15 13:51:46,423 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 7288 transitions. Word has length 30 [2022-02-15 13:51:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:46,423 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 7288 transitions. [2022-02-15 13:51:46,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:51:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 7288 transitions. [2022-02-15 13:51:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:46,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:46,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:46,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-15 13:51:46,626 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash -210418558, now seen corresponding path program 77 times [2022-02-15 13:51:46,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:46,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139431062] [2022-02-15 13:51:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:46,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:46,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:46,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139431062] [2022-02-15 13:51:46,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139431062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:46,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447690327] [2022-02-15 13:51:46,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:51:46,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:46,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:46,918 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:46,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-15 13:51:46,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:51:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:46,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:47,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:51:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:47,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:47,455 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:51:47,455 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:51:47,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:47,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:47,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:51:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:47,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447690327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:47,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:47,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:51:47,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308360653] [2022-02-15 13:51:47,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:47,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:51:47,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:51:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:51:47,551 INFO L87 Difference]: Start difference. First operand 2885 states and 7288 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:51:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:51,069 INFO L93 Difference]: Finished difference Result 5852 states and 14730 transitions. [2022-02-15 13:51:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:51:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 30 [2022-02-15 13:51:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:51,076 INFO L225 Difference]: With dead ends: 5852 [2022-02-15 13:51:51,076 INFO L226 Difference]: Without dead ends: 5837 [2022-02-15 13:51:51,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1119, Invalid=8001, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 13:51:51,076 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 495 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:51,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 302 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:51:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-02-15 13:51:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 2918. [2022-02-15 13:51:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 2.5269112101474116) internal successors, (7371), 2917 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 7371 transitions. [2022-02-15 13:51:51,115 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 7371 transitions. Word has length 30 [2022-02-15 13:51:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 2918 states and 7371 transitions. [2022-02-15 13:51:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 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 13:51:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 7371 transitions. [2022-02-15 13:51:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:51,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:51,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:51,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-15 13:51:51,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:51,321 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash 454784610, now seen corresponding path program 78 times [2022-02-15 13:51:51,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:51,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510972601] [2022-02-15 13:51:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:51,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:51,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:51,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510972601] [2022-02-15 13:51:51,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510972601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:51,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368469418] [2022-02-15 13:51:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:51:51,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:51,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:51,579 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:51,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-15 13:51:51,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:51:51,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:51:51,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:51:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:51:51,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:51,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2022-02-15 13:51:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:51:52,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:51:52,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:51:52,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-15 13:51:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:52,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368469418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:51:52,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:51:52,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-02-15 13:51:52,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842869939] [2022-02-15 13:51:52,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:51:52,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 13:51:52,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:51:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 13:51:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:51:52,676 INFO L87 Difference]: Start difference. First operand 2918 states and 7371 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 13:51:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:51:59,037 INFO L93 Difference]: Finished difference Result 5349 states and 13484 transitions. [2022-02-15 13:51:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-15 13:51:59,038 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 30 [2022-02-15 13:51:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:51:59,045 INFO L225 Difference]: With dead ends: 5349 [2022-02-15 13:51:59,045 INFO L226 Difference]: Without dead ends: 5327 [2022-02-15 13:51:59,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4630 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2184, Invalid=11388, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 13:51:59,046 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 575 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3287 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:51:59,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 247 Invalid, 5197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1594 Invalid, 0 Unknown, 3287 Unchecked, 0.8s Time] [2022-02-15 13:51:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2022-02-15 13:51:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 3062. [2022-02-15 13:51:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 2.5315256452139825) internal successors, (7749), 3061 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:51:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 7749 transitions. [2022-02-15 13:51:59,088 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 7749 transitions. Word has length 30 [2022-02-15 13:51:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:51:59,089 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 7749 transitions. [2022-02-15 13:51:59,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 13:51:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 7749 transitions. [2022-02-15 13:51:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:51:59,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:51:59,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:51:59,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-02-15 13:51:59,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-02-15 13:51:59,307 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:51:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:51:59,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1453037920, now seen corresponding path program 79 times [2022-02-15 13:51:59,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:51:59,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854070134] [2022-02-15 13:51:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:51:59,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:51:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:59,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:51:59,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854070134] [2022-02-15 13:51:59,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854070134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:51:59,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682868186] [2022-02-15 13:51:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:51:59,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:51:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:51:59,546 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:51:59,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-15 13:51:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:51:59,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:51:59,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:51:59,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-15 13:51:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:51:59,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:00,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:00,045 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:00,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:00,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:00,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:00,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:00,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682868186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:00,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:00,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:52:00,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843108982] [2022-02-15 13:52:00,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:00,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:52:00,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:52:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:52:00,120 INFO L87 Difference]: Start difference. First operand 3062 states and 7749 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:52:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:01,838 INFO L93 Difference]: Finished difference Result 5184 states and 12984 transitions. [2022-02-15 13:52:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:52:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:52:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:01,846 INFO L225 Difference]: With dead ends: 5184 [2022-02-15 13:52:01,846 INFO L226 Difference]: Without dead ends: 5157 [2022-02-15 13:52:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=580, Invalid=4250, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:52:01,847 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 472 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:01,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 263 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:52:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-02-15 13:52:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3064. [2022-02-15 13:52:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3063 states have (on average 2.5301991511589943) internal successors, (7750), 3063 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 7750 transitions. [2022-02-15 13:52:01,886 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 7750 transitions. Word has length 30 [2022-02-15 13:52:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:01,886 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 7750 transitions. [2022-02-15 13:52:01,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:52:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 7750 transitions. [2022-02-15 13:52:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:01,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:01,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:01,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-15 13:52:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:02,102 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 918736294, now seen corresponding path program 80 times [2022-02-15 13:52:02,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:02,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400355606] [2022-02-15 13:52:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:02,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:02,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:02,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400355606] [2022-02-15 13:52:02,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400355606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:02,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386973691] [2022-02-15 13:52:02,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:02,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:02,300 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:02,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-15 13:52:02,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:02,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:02,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:02,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:02,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:52:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:02,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:02,730 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:02,730 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:52:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:02,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:02,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:02,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386973691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:02,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:02,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:52:02,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531775927] [2022-02-15 13:52:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:02,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:52:02,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:52:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:52:02,805 INFO L87 Difference]: Start difference. First operand 3064 states and 7750 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:52:04,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:04,504 INFO L93 Difference]: Finished difference Result 5316 states and 13410 transitions. [2022-02-15 13:52:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:52:04,504 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:52:04,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:04,510 INFO L225 Difference]: With dead ends: 5316 [2022-02-15 13:52:04,510 INFO L226 Difference]: Without dead ends: 5281 [2022-02-15 13:52:04,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=4347, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:52:04,510 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 462 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:04,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 250 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:52:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2022-02-15 13:52:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3021. [2022-02-15 13:52:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 2.529139072847682) internal successors, (7638), 3020 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 7638 transitions. [2022-02-15 13:52:04,547 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 7638 transitions. Word has length 30 [2022-02-15 13:52:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 7638 transitions. [2022-02-15 13:52:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:52:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 7638 transitions. [2022-02-15 13:52:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:04,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:04,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:04,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:04,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-15 13:52:04,761 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2064792814, now seen corresponding path program 81 times [2022-02-15 13:52:04,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:04,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248003859] [2022-02-15 13:52:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:04,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:05,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248003859] [2022-02-15 13:52:05,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248003859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395202317] [2022-02-15 13:52:05,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:05,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:05,076 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:05,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-15 13:52:05,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:52:05,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:05,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:05,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:52:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:05,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:05,607 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:05,607 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:05,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:05,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395202317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:05,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:05,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:52:05,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883218764] [2022-02-15 13:52:05,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:05,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:52:05,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:52:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:52:05,678 INFO L87 Difference]: Start difference. First operand 3021 states and 7638 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:52:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:06,930 INFO L93 Difference]: Finished difference Result 4969 states and 12488 transitions. [2022-02-15 13:52:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:52:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:52:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:06,936 INFO L225 Difference]: With dead ends: 4969 [2022-02-15 13:52:06,936 INFO L226 Difference]: Without dead ends: 4960 [2022-02-15 13:52:06,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=2528, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:52:06,936 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 325 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:06,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 415 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:52:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2022-02-15 13:52:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3018. [2022-02-15 13:52:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3017 states have (on average 2.5293337752734506) internal successors, (7631), 3017 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 7631 transitions. [2022-02-15 13:52:06,972 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 7631 transitions. Word has length 30 [2022-02-15 13:52:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:06,972 INFO L470 AbstractCegarLoop]: Abstraction has 3018 states and 7631 transitions. [2022-02-15 13:52:06,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:52:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 7631 transitions. [2022-02-15 13:52:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:06,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:06,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:06,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:07,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-15 13:52:07,191 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -933223622, now seen corresponding path program 51 times [2022-02-15 13:52:07,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:07,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206083246] [2022-02-15 13:52:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:07,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:07,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:07,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206083246] [2022-02-15 13:52:07,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206083246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:07,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292643023] [2022-02-15 13:52:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:07,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:07,522 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:07,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-15 13:52:07,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:52:07,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:07,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:07,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:52:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:07,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:08,083 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:08,084 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:08,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:08,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:08,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292643023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:08,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:08,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:08,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040990106] [2022-02-15 13:52:08,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:08,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:08,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:08,182 INFO L87 Difference]: Start difference. First operand 3018 states and 7631 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:09,496 INFO L93 Difference]: Finished difference Result 4991 states and 12548 transitions. [2022-02-15 13:52:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:52:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:52:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:09,504 INFO L225 Difference]: With dead ends: 4991 [2022-02-15 13:52:09,504 INFO L226 Difference]: Without dead ends: 4982 [2022-02-15 13:52:09,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:52:09,504 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 419 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:09,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 262 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:52:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-02-15 13:52:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3048. [2022-02-15 13:52:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 2.5260912372825732) internal successors, (7697), 3047 states have internal predecessors, (7697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 7697 transitions. [2022-02-15 13:52:09,550 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 7697 transitions. Word has length 30 [2022-02-15 13:52:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:09,550 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 7697 transitions. [2022-02-15 13:52:09,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 7697 transitions. [2022-02-15 13:52:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:09,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:09,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-15 13:52:09,769 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1222951236, now seen corresponding path program 52 times [2022-02-15 13:52:09,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:09,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801422897] [2022-02-15 13:52:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:09,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:10,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:10,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801422897] [2022-02-15 13:52:10,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801422897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:10,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472301227] [2022-02-15 13:52:10,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:10,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:10,027 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:10,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-15 13:52:10,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:10,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:10,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:10,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:52:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:10,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:10,654 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:10,654 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:10,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:10,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472301227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:10,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:10,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:10,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476884434] [2022-02-15 13:52:10,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:10,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:10,763 INFO L87 Difference]: Start difference. First operand 3048 states and 7697 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:12,697 INFO L93 Difference]: Finished difference Result 5373 states and 13478 transitions. [2022-02-15 13:52:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:52:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:52:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:12,704 INFO L225 Difference]: With dead ends: 5373 [2022-02-15 13:52:12,704 INFO L226 Difference]: Without dead ends: 5356 [2022-02-15 13:52:12,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:52:12,704 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 409 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:12,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 337 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:52:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-02-15 13:52:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 3065. [2022-02-15 13:52:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5267624020887727) internal successors, (7742), 3064 states have internal predecessors, (7742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7742 transitions. [2022-02-15 13:52:12,743 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7742 transitions. Word has length 30 [2022-02-15 13:52:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:12,743 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 7742 transitions. [2022-02-15 13:52:12,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7742 transitions. [2022-02-15 13:52:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:12,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:12,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:12,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-15 13:52:12,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-15 13:52:12,962 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash 670553370, now seen corresponding path program 53 times [2022-02-15 13:52:12,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:12,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779387473] [2022-02-15 13:52:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:12,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:13,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:13,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779387473] [2022-02-15 13:52:13,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779387473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:13,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466442882] [2022-02-15 13:52:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:13,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:13,268 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:13,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-15 13:52:13,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:52:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:13,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:13,577 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:52:13,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-15 13:52:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:13,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:13,846 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:13,847 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:13,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:13,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:13,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466442882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:13,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:13,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:13,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442458299] [2022-02-15 13:52:13,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:13,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:13,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:13,942 INFO L87 Difference]: Start difference. First operand 3065 states and 7742 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:15,989 INFO L93 Difference]: Finished difference Result 5999 states and 15107 transitions. [2022-02-15 13:52:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:52:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:52:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:15,997 INFO L225 Difference]: With dead ends: 5999 [2022-02-15 13:52:15,997 INFO L226 Difference]: Without dead ends: 5986 [2022-02-15 13:52:15,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=608, Invalid=3424, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:52:15,998 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 392 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:15,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 260 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:52:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2022-02-15 13:52:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 3061. [2022-02-15 13:52:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.527124183006536) internal successors, (7733), 3060 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7733 transitions. [2022-02-15 13:52:16,042 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7733 transitions. Word has length 30 [2022-02-15 13:52:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 7733 transitions. [2022-02-15 13:52:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7733 transitions. [2022-02-15 13:52:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:16,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:16,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:16,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-15 13:52:16,261 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1335756538, now seen corresponding path program 54 times [2022-02-15 13:52:16,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:16,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482722914] [2022-02-15 13:52:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:16,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:16,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482722914] [2022-02-15 13:52:16,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482722914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:16,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554436140] [2022-02-15 13:52:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:16,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:16,463 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:16,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-15 13:52:16,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:52:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:16,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:16,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:16,931 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:16,932 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:16,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:16,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554436140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:16,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:16,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:52:16,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861236256] [2022-02-15 13:52:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:16,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:52:16,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:52:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:52:16,999 INFO L87 Difference]: Start difference. First operand 3061 states and 7733 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:18,255 INFO L93 Difference]: Finished difference Result 5116 states and 12913 transitions. [2022-02-15 13:52:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:52:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:52:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:18,262 INFO L225 Difference]: With dead ends: 5116 [2022-02-15 13:52:18,262 INFO L226 Difference]: Without dead ends: 5098 [2022-02-15 13:52:18,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=386, Invalid=2584, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:52:18,262 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 399 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:18,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 210 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:52:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2022-02-15 13:52:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 3051. [2022-02-15 13:52:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3050 states have (on average 2.525901639344262) internal successors, (7704), 3050 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 7704 transitions. [2022-02-15 13:52:18,302 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 7704 transitions. Word has length 30 [2022-02-15 13:52:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:18,302 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 7704 transitions. [2022-02-15 13:52:18,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 7704 transitions. [2022-02-15 13:52:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:18,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:18,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:18,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:18,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-15 13:52:18,521 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1799082352, now seen corresponding path program 55 times [2022-02-15 13:52:18,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:18,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215661612] [2022-02-15 13:52:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:18,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:18,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:18,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215661612] [2022-02-15 13:52:18,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215661612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:18,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894925791] [2022-02-15 13:52:18,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:18,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:18,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:18,731 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:18,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-15 13:52:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:18,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:18,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:52:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:19,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:19,299 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:19,299 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:19,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:19,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:19,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894925791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:19,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:19,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:19,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808078273] [2022-02-15 13:52:19,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:19,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:19,414 INFO L87 Difference]: Start difference. First operand 3051 states and 7704 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:20,926 INFO L93 Difference]: Finished difference Result 5095 states and 12813 transitions. [2022-02-15 13:52:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:52:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:52:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:20,934 INFO L225 Difference]: With dead ends: 5095 [2022-02-15 13:52:20,934 INFO L226 Difference]: Without dead ends: 5086 [2022-02-15 13:52:20,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:52:20,935 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 364 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:20,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 322 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:52:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2022-02-15 13:52:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 3048. [2022-02-15 13:52:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 2.5260912372825732) internal successors, (7697), 3047 states have internal predecessors, (7697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 7697 transitions. [2022-02-15 13:52:20,979 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 7697 transitions. Word has length 30 [2022-02-15 13:52:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:20,979 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 7697 transitions. [2022-02-15 13:52:20,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 7697 transitions. [2022-02-15 13:52:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:20,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:20,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:20,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:21,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:21,198 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1719457060, now seen corresponding path program 56 times [2022-02-15 13:52:21,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:21,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747566931] [2022-02-15 13:52:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:21,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:21,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:21,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747566931] [2022-02-15 13:52:21,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747566931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:21,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678979536] [2022-02-15 13:52:21,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:21,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:21,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:21,509 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:21,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-15 13:52:21,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:21,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:21,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:21,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:21,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:52:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:21,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:22,158 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:22,159 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:22,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:22,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678979536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:22,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:22,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:22,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339991129] [2022-02-15 13:52:22,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:22,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:22,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:22,276 INFO L87 Difference]: Start difference. First operand 3048 states and 7697 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:24,359 INFO L93 Difference]: Finished difference Result 5097 states and 12824 transitions. [2022-02-15 13:52:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:52:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:52:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:24,367 INFO L225 Difference]: With dead ends: 5097 [2022-02-15 13:52:24,367 INFO L226 Difference]: Without dead ends: 5070 [2022-02-15 13:52:24,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=614, Invalid=3418, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:52:24,368 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:24,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 271 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:52:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2022-02-15 13:52:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 3080. [2022-02-15 13:52:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 2.5264696329977268) internal successors, (7779), 3079 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 7779 transitions. [2022-02-15 13:52:24,423 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 7779 transitions. Word has length 30 [2022-02-15 13:52:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:24,423 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 7779 transitions. [2022-02-15 13:52:24,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 7779 transitions. [2022-02-15 13:52:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:24,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:24,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:24,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:24,643 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1098969924, now seen corresponding path program 57 times [2022-02-15 13:52:24,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:24,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326049061] [2022-02-15 13:52:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:24,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:24,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326049061] [2022-02-15 13:52:24,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326049061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:24,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465407328] [2022-02-15 13:52:24,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:24,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:24,913 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:24,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-15 13:52:24,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:52:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:24,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:52:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:25,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:25,279 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 3 case distinctions, treesize of input 22 treesize of output 38 [2022-02-15 13:52:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:26,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:26,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:26,196 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:52:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:26,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465407328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:26,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:26,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-15 13:52:26,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294278408] [2022-02-15 13:52:26,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:26,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:52:26,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:52:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:52:26,268 INFO L87 Difference]: Start difference. First operand 3080 states and 7779 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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 13:52:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:31,013 INFO L93 Difference]: Finished difference Result 6451 states and 16326 transitions. [2022-02-15 13:52:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 13:52:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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 30 [2022-02-15 13:52:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:31,022 INFO L225 Difference]: With dead ends: 6451 [2022-02-15 13:52:31,022 INFO L226 Difference]: Without dead ends: 6436 [2022-02-15 13:52:31,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3937 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2084, Invalid=9258, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 13:52:31,023 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 673 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1106 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:31,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 162 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1482 Invalid, 0 Unknown, 1106 Unchecked, 0.7s Time] [2022-02-15 13:52:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2022-02-15 13:52:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 3101. [2022-02-15 13:52:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.526774193548387) internal successors, (7833), 3100 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 7833 transitions. [2022-02-15 13:52:31,067 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 7833 transitions. Word has length 30 [2022-02-15 13:52:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:31,067 INFO L470 AbstractCegarLoop]: Abstraction has 3101 states and 7833 transitions. [2022-02-15 13:52:31,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 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 13:52:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 7833 transitions. [2022-02-15 13:52:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:31,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:31,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:31,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:31,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-15 13:52:31,284 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 7772042, now seen corresponding path program 58 times [2022-02-15 13:52:31,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:31,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309174706] [2022-02-15 13:52:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:31,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:31,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:31,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309174706] [2022-02-15 13:52:31,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309174706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:31,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501952992] [2022-02-15 13:52:31,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:31,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:31,485 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:31,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-15 13:52:31,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:31,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:31,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:31,962 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:31,963 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:32,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:32,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501952992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:32,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:32,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:52:32,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241474744] [2022-02-15 13:52:32,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:32,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:32,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:32,078 INFO L87 Difference]: Start difference. First operand 3101 states and 7833 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 13:52:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:33,716 INFO L93 Difference]: Finished difference Result 5575 states and 14100 transitions. [2022-02-15 13:52:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:52:33,716 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 30 [2022-02-15 13:52:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:33,724 INFO L225 Difference]: With dead ends: 5575 [2022-02-15 13:52:33,724 INFO L226 Difference]: Without dead ends: 5556 [2022-02-15 13:52:33,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=548, Invalid=3484, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:52:33,725 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:33,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 227 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:52:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2022-02-15 13:52:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3095. [2022-02-15 13:52:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 2.5277957336780865) internal successors, (7821), 3094 states have internal predecessors, (7821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 7821 transitions. [2022-02-15 13:52:33,769 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 7821 transitions. Word has length 30 [2022-02-15 13:52:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:33,769 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 7821 transitions. [2022-02-15 13:52:33,769 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 13:52:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 7821 transitions. [2022-02-15 13:52:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:33,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:33,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:33,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:33,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:33,987 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1764173092, now seen corresponding path program 59 times [2022-02-15 13:52:33,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:33,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166904659] [2022-02-15 13:52:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:33,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:34,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:34,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166904659] [2022-02-15 13:52:34,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166904659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:34,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768531197] [2022-02-15 13:52:34,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:34,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:34,239 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:34,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-15 13:52:34,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:52:34,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:34,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:34,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:34,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:34,880 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:34,880 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:34,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:34,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:34,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768531197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:34,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:34,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:52:34,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715376050] [2022-02-15 13:52:34,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:34,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:52:34,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:52:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:52:34,996 INFO L87 Difference]: Start difference. First operand 3095 states and 7821 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:36,955 INFO L93 Difference]: Finished difference Result 4860 states and 12249 transitions. [2022-02-15 13:52:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:52:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:52:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:36,962 INFO L225 Difference]: With dead ends: 4860 [2022-02-15 13:52:36,962 INFO L226 Difference]: Without dead ends: 4834 [2022-02-15 13:52:36,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:52:36,963 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 329 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:36,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 219 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:52:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-02-15 13:52:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 3085. [2022-02-15 13:52:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 2.527237354085603) internal successors, (7794), 3084 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 7794 transitions. [2022-02-15 13:52:37,005 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 7794 transitions. Word has length 30 [2022-02-15 13:52:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 7794 transitions. [2022-02-15 13:52:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 7794 transitions. [2022-02-15 13:52:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:37,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:37,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-15 13:52:37,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-02-15 13:52:37,209 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2108464666, now seen corresponding path program 60 times [2022-02-15 13:52:37,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:37,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109688186] [2022-02-15 13:52:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:37,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:37,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:37,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109688186] [2022-02-15 13:52:37,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109688186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:37,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904115622] [2022-02-15 13:52:37,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:37,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:37,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:37,517 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:37,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-15 13:52:37,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:52:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:37,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:52:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:37,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:37,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:37,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:38,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:38,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:38,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:38,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:52:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:38,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904115622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:38,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:38,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-15 13:52:38,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649826766] [2022-02-15 13:52:38,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:52:38,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:52:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:52:38,514 INFO L87 Difference]: Start difference. First operand 3085 states and 7794 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:52:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:41,653 INFO L93 Difference]: Finished difference Result 5407 states and 13779 transitions. [2022-02-15 13:52:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:52:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 30 [2022-02-15 13:52:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:41,662 INFO L225 Difference]: With dead ends: 5407 [2022-02-15 13:52:41,662 INFO L226 Difference]: Without dead ends: 5396 [2022-02-15 13:52:41,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:52:41,663 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 403 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:41,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 182 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1289 Invalid, 0 Unknown, 2596 Unchecked, 0.5s Time] [2022-02-15 13:52:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2022-02-15 13:52:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 3156. [2022-02-15 13:52:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 2.5315372424722664) internal successors, (7987), 3155 states have internal predecessors, (7987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 7987 transitions. [2022-02-15 13:52:41,711 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 7987 transitions. Word has length 30 [2022-02-15 13:52:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:41,712 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 7987 transitions. [2022-02-15 13:52:41,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:52:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 7987 transitions. [2022-02-15 13:52:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:41,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:41,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:41,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-15 13:52:41,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:41,925 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:41,925 INFO L85 PathProgramCache]: Analyzing trace with hash -352063616, now seen corresponding path program 61 times [2022-02-15 13:52:41,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:41,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176468482] [2022-02-15 13:52:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:41,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:42,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:42,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176468482] [2022-02-15 13:52:42,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176468482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:42,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759158638] [2022-02-15 13:52:42,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:52:42,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:42,204 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:42,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-15 13:52:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:42,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:42,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:42,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:52:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:42,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:42,846 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:42,846 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:42,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:42,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:42,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:42,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759158638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:42,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:42,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:52:42,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220091453] [2022-02-15 13:52:42,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:42,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:52:42,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:52:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:52:42,967 INFO L87 Difference]: Start difference. First operand 3156 states and 7987 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:45,107 INFO L93 Difference]: Finished difference Result 5008 states and 12696 transitions. [2022-02-15 13:52:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:52:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:52:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:45,114 INFO L225 Difference]: With dead ends: 5008 [2022-02-15 13:52:45,114 INFO L226 Difference]: Without dead ends: 4994 [2022-02-15 13:52:45,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=460, Invalid=3700, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:52:45,115 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 384 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:45,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 221 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:52:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2022-02-15 13:52:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 3163. [2022-02-15 13:52:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.5309930423782414) internal successors, (8003), 3162 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8003 transitions. [2022-02-15 13:52:45,156 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8003 transitions. Word has length 30 [2022-02-15 13:52:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:45,156 INFO L470 AbstractCegarLoop]: Abstraction has 3163 states and 8003 transitions. [2022-02-15 13:52:45,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8003 transitions. [2022-02-15 13:52:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:45,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:45,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:45,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:45,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-15 13:52:45,366 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash 183380592, now seen corresponding path program 62 times [2022-02-15 13:52:45,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:45,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476720492] [2022-02-15 13:52:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:45,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:45,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:45,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476720492] [2022-02-15 13:52:45,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476720492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:45,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087334595] [2022-02-15 13:52:45,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:52:45,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:45,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:45,641 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:45,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-15 13:52:45,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:52:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:45,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:45,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:45,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:46,140 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:46,141 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:46,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:46,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:46,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:52:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:46,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087334595] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:46,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:46,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:52:46,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150504362] [2022-02-15 13:52:46,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:46,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:52:46,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:52:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:52:46,236 INFO L87 Difference]: Start difference. First operand 3163 states and 8003 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:52:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:47,933 INFO L93 Difference]: Finished difference Result 4974 states and 12584 transitions. [2022-02-15 13:52:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:52:47,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 30 [2022-02-15 13:52:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:47,941 INFO L225 Difference]: With dead ends: 4974 [2022-02-15 13:52:47,941 INFO L226 Difference]: Without dead ends: 4964 [2022-02-15 13:52:47,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=3293, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:52:47,941 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 331 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:47,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 224 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:52:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2022-02-15 13:52:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 3162. [2022-02-15 13:52:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3161 states have (on average 2.531161024992091) internal successors, (8001), 3161 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 8001 transitions. [2022-02-15 13:52:47,992 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 8001 transitions. Word has length 30 [2022-02-15 13:52:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:47,992 INFO L470 AbstractCegarLoop]: Abstraction has 3162 states and 8001 transitions. [2022-02-15 13:52:47,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:52:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 8001 transitions. [2022-02-15 13:52:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:47,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:47,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:48,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-15 13:52:48,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-15 13:52:48,211 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:48,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1799589630, now seen corresponding path program 63 times [2022-02-15 13:52:48,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:48,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331183175] [2022-02-15 13:52:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:48,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:48,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:48,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331183175] [2022-02-15 13:52:48,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331183175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:48,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390877516] [2022-02-15 13:52:48,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:52:48,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:48,432 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:48,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-15 13:52:48,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:52:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:48,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:48,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:52:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:48,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:48,827 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:48,827 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:48,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:48,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:48,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:48,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:48,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390877516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:48,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:48,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:52:48,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789112186] [2022-02-15 13:52:48,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:48,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:52:48,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:52:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:52:48,902 INFO L87 Difference]: Start difference. First operand 3162 states and 8001 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:51,193 INFO L93 Difference]: Finished difference Result 6661 states and 16986 transitions. [2022-02-15 13:52:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:52:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:52:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:51,202 INFO L225 Difference]: With dead ends: 6661 [2022-02-15 13:52:51,202 INFO L226 Difference]: Without dead ends: 6634 [2022-02-15 13:52:51,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=909, Invalid=6401, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:52:51,203 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 494 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:51,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 197 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:52:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6634 states. [2022-02-15 13:52:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6634 to 3155. [2022-02-15 13:52:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 2.5313887127457195) internal successors, (7984), 3154 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 7984 transitions. [2022-02-15 13:52:51,254 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 7984 transitions. Word has length 30 [2022-02-15 13:52:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:51,254 INFO L470 AbstractCegarLoop]: Abstraction has 3155 states and 7984 transitions. [2022-02-15 13:52:51,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:52:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 7984 transitions. [2022-02-15 13:52:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:51,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:51,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:51,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:51,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-15 13:52:51,471 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1420028430, now seen corresponding path program 64 times [2022-02-15 13:52:51,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:51,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425849621] [2022-02-15 13:52:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:51,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:51,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425849621] [2022-02-15 13:52:51,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425849621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211759215] [2022-02-15 13:52:51,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:52:51,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:51,666 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:51,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-15 13:52:51,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:52:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:51,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:51,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-15 13:52:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:52,115 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:52,116 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:52,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:52,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211759215] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:52,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:52,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:52:52,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874333337] [2022-02-15 13:52:52,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:52,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:52:52,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:52:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:52:52,191 INFO L87 Difference]: Start difference. First operand 3155 states and 7984 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:54,070 INFO L93 Difference]: Finished difference Result 5457 states and 13709 transitions. [2022-02-15 13:52:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:52:54,070 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:52:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:54,077 INFO L225 Difference]: With dead ends: 5457 [2022-02-15 13:52:54,077 INFO L226 Difference]: Without dead ends: 5432 [2022-02-15 13:52:54,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:52:54,078 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 447 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:54,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 259 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:52:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5432 states. [2022-02-15 13:52:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5432 to 3185. [2022-02-15 13:52:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 2.5326633165829144) internal successors, (8064), 3184 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 8064 transitions. [2022-02-15 13:52:54,121 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 8064 transitions. Word has length 30 [2022-02-15 13:52:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 8064 transitions. [2022-02-15 13:52:54,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:52:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 8064 transitions. [2022-02-15 13:52:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:54,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:54,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:54,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-15 13:52:54,330 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 602502286, now seen corresponding path program 65 times [2022-02-15 13:52:54,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:54,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98407612] [2022-02-15 13:52:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:54,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:54,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:54,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98407612] [2022-02-15 13:52:54,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98407612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:54,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889281658] [2022-02-15 13:52:54,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:52:54,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:54,629 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:54,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-15 13:52:54,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:52:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:54,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:52:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:54,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:52:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:54,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:55,220 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:52:55,220 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:52:55,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:55,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:52:55,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:52:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:55,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889281658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:55,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:55,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:52:55,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283214501] [2022-02-15 13:52:55,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:55,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:52:55,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:52:55,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:52:55,336 INFO L87 Difference]: Start difference. First operand 3185 states and 8064 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 13:52:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:52:56,947 INFO L93 Difference]: Finished difference Result 5809 states and 14706 transitions. [2022-02-15 13:52:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:52:56,947 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 30 [2022-02-15 13:52:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:52:56,956 INFO L225 Difference]: With dead ends: 5809 [2022-02-15 13:52:56,956 INFO L226 Difference]: Without dead ends: 5790 [2022-02-15 13:52:56,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:52:56,956 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 348 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:52:56,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 222 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:52:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2022-02-15 13:52:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 3170. [2022-02-15 13:52:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.5329757021142316) internal successors, (8027), 3169 states have internal predecessors, (8027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:52:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 8027 transitions. [2022-02-15 13:52:57,007 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 8027 transitions. Word has length 30 [2022-02-15 13:52:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:52:57,007 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 8027 transitions. [2022-02-15 13:52:57,007 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 13:52:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 8027 transitions. [2022-02-15 13:52:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:52:57,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:52:57,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:52:57,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-15 13:52:57,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:57,226 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:52:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:52:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1936063960, now seen corresponding path program 66 times [2022-02-15 13:52:57,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:52:57,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469418089] [2022-02-15 13:52:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:52:57,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:52:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:52:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:57,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:52:57,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469418089] [2022-02-15 13:52:57,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469418089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:52:57,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735190044] [2022-02-15 13:52:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:52:57,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:52:57,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:52:57,420 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:52:57,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-15 13:52:57,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:52:57,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:52:57,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:52:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:52:57,677 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 13:52:57,677 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 3 case distinctions, treesize of input 40 treesize of output 42 [2022-02-15 13:52:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:57,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:52:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:58,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:52:58,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:52:58,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-15 13:52:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:52:58,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735190044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:52:58,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:52:58,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-02-15 13:52:58,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272948846] [2022-02-15 13:52:58,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:52:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:52:58,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:52:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:52:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:52:58,297 INFO L87 Difference]: Start difference. First operand 3170 states and 8027 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 13:53:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:00,908 INFO L93 Difference]: Finished difference Result 4890 states and 12392 transitions. [2022-02-15 13:53:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:53:00,909 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 30 [2022-02-15 13:53:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:00,916 INFO L225 Difference]: With dead ends: 4890 [2022-02-15 13:53:00,916 INFO L226 Difference]: Without dead ends: 4870 [2022-02-15 13:53:00,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=792, Invalid=4610, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:53:00,917 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 381 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2752 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:00,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 161 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 906 Invalid, 0 Unknown, 2752 Unchecked, 0.4s Time] [2022-02-15 13:53:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-02-15 13:53:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 3209. [2022-02-15 13:53:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.535224438902743) internal successors, (8133), 3208 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8133 transitions. [2022-02-15 13:53:00,959 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8133 transitions. Word has length 30 [2022-02-15 13:53:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 8133 transitions. [2022-02-15 13:53:00,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 13:53:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8133 transitions. [2022-02-15 13:53:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:00,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:00,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:00,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:01,169 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash -593616036, now seen corresponding path program 67 times [2022-02-15 13:53:01,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:01,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841508638] [2022-02-15 13:53:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:01,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:01,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:01,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841508638] [2022-02-15 13:53:01,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841508638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:01,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876500798] [2022-02-15 13:53:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:01,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:01,448 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:01,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-15 13:53:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:01,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:01,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:01,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:02,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:02,086 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:02,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:02,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:02,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:02,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:02,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876500798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:02,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:02,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:53:02,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951998002] [2022-02-15 13:53:02,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:02,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:02,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:02,209 INFO L87 Difference]: Start difference. First operand 3209 states and 8133 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:03,848 INFO L93 Difference]: Finished difference Result 5129 states and 12973 transitions. [2022-02-15 13:53:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:53:03,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:03,856 INFO L225 Difference]: With dead ends: 5129 [2022-02-15 13:53:03,856 INFO L226 Difference]: Without dead ends: 5107 [2022-02-15 13:53:03,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=2705, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:53:03,857 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 291 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:03,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 235 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:53:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2022-02-15 13:53:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3179. [2022-02-15 13:53:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.5324103209565765) internal successors, (8048), 3178 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 8048 transitions. [2022-02-15 13:53:03,901 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 8048 transitions. Word has length 30 [2022-02-15 13:53:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:03,902 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 8048 transitions. [2022-02-15 13:53:03,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 8048 transitions. [2022-02-15 13:53:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:03,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:03,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:03,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:04,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-15 13:53:04,119 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1108140126, now seen corresponding path program 68 times [2022-02-15 13:53:04,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:04,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304682226] [2022-02-15 13:53:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:04,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:04,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:04,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304682226] [2022-02-15 13:53:04,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304682226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:04,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029747968] [2022-02-15 13:53:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:04,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:04,333 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:04,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-15 13:53:04,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:04,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:04,591 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:53:04,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 48 [2022-02-15 13:53:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:04,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:04,845 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:04,845 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:04,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:04,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029747968] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:04,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:04,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:53:04,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694332084] [2022-02-15 13:53:04,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:53:04,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:53:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:53:04,969 INFO L87 Difference]: Start difference. First operand 3179 states and 8048 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:53:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:06,074 INFO L93 Difference]: Finished difference Result 5229 states and 13160 transitions. [2022-02-15 13:53:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:53:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:53:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:06,081 INFO L225 Difference]: With dead ends: 5229 [2022-02-15 13:53:06,081 INFO L226 Difference]: Without dead ends: 5218 [2022-02-15 13:53:06,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:53:06,082 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 380 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:06,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 270 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:53:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-02-15 13:53:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 3176. [2022-02-15 13:53:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.5325984251968503) internal successors, (8041), 3175 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8041 transitions. [2022-02-15 13:53:06,127 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8041 transitions. Word has length 30 [2022-02-15 13:53:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:06,127 INFO L470 AbstractCegarLoop]: Abstraction has 3176 states and 8041 transitions. [2022-02-15 13:53:06,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:53:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8041 transitions. [2022-02-15 13:53:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:06,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:06,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:06,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-15 13:53:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-15 13:53:06,343 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1907308062, now seen corresponding path program 69 times [2022-02-15 13:53:06,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:06,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402258511] [2022-02-15 13:53:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:06,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:06,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:06,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402258511] [2022-02-15 13:53:06,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402258511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:06,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263949453] [2022-02-15 13:53:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:06,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:06,564 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-15 13:53:06,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:53:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:06,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:53:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:06,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:06,846 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 3 case distinctions, treesize of input 26 treesize of output 42 [2022-02-15 13:53:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:07,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:07,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:07,726 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-15 13:53:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:07,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263949453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:07,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:07,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-15 13:53:07,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943005584] [2022-02-15 13:53:07,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:07,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:53:07,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:53:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:53:07,779 INFO L87 Difference]: Start difference. First operand 3176 states and 8041 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 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 13:53:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:12,428 INFO L93 Difference]: Finished difference Result 6599 states and 16665 transitions. [2022-02-15 13:53:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 13:53:12,429 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 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 30 [2022-02-15 13:53:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:12,438 INFO L225 Difference]: With dead ends: 6599 [2022-02-15 13:53:12,438 INFO L226 Difference]: Without dead ends: 6566 [2022-02-15 13:53:12,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2505, Invalid=12257, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 13:53:12,439 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 637 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:12,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 194 Invalid, 3597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1858 Invalid, 0 Unknown, 1328 Unchecked, 0.9s Time] [2022-02-15 13:53:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2022-02-15 13:53:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 3218. [2022-02-15 13:53:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 2.5331053776810695) internal successors, (8149), 3217 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 8149 transitions. [2022-02-15 13:53:12,498 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 8149 transitions. Word has length 30 [2022-02-15 13:53:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 8149 transitions. [2022-02-15 13:53:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 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 13:53:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 8149 transitions. [2022-02-15 13:53:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:12,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:12,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:12,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-15 13:53:12,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:12,709 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1286820926, now seen corresponding path program 70 times [2022-02-15 13:53:12,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:12,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912709439] [2022-02-15 13:53:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:13,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:13,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912709439] [2022-02-15 13:53:13,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912709439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:13,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028016470] [2022-02-15 13:53:13,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:13,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:13,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:13,024 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:13,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-15 13:53:13,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:13,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:13,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:13,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:13,496 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:13,496 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:13,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:13,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:13,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:13,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028016470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:13,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:13,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:53:13,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549574518] [2022-02-15 13:53:13,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:53:13,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:53:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:53:13,567 INFO L87 Difference]: Start difference. First operand 3218 states and 8149 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:16,764 INFO L93 Difference]: Finished difference Result 6381 states and 16116 transitions. [2022-02-15 13:53:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 13:53:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:53:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:16,774 INFO L225 Difference]: With dead ends: 6381 [2022-02-15 13:53:16,775 INFO L226 Difference]: Without dead ends: 6352 [2022-02-15 13:53:16,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1645, Invalid=11465, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 13:53:16,776 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 648 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:16,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 214 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2677 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:53:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2022-02-15 13:53:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 3264. [2022-02-15 13:53:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.535090407600368) internal successors, (8272), 3263 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8272 transitions. [2022-02-15 13:53:16,861 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8272 transitions. Word has length 30 [2022-02-15 13:53:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:16,861 INFO L470 AbstractCegarLoop]: Abstraction has 3264 states and 8272 transitions. [2022-02-15 13:53:16,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8272 transitions. [2022-02-15 13:53:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:16,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:16,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:16,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:17,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:17,080 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1952024094, now seen corresponding path program 71 times [2022-02-15 13:53:17,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:17,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464765642] [2022-02-15 13:53:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:17,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:17,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:17,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464765642] [2022-02-15 13:53:17,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464765642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:17,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042539434] [2022-02-15 13:53:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:17,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:17,309 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:17,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-15 13:53:17,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:53:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:17,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:17,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:17,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:17,887 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:17,887 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:17,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:17,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:17,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042539434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:17,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:17,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:53:17,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350708351] [2022-02-15 13:53:17,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:17,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:17,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:17,966 INFO L87 Difference]: Start difference. First operand 3264 states and 8272 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:19,800 INFO L93 Difference]: Finished difference Result 5279 states and 13360 transitions. [2022-02-15 13:53:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:53:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:19,807 INFO L225 Difference]: With dead ends: 5279 [2022-02-15 13:53:19,808 INFO L226 Difference]: Without dead ends: 5251 [2022-02-15 13:53:19,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=696, Invalid=4854, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:53:19,808 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 470 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:19,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 167 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:53:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2022-02-15 13:53:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3274. [2022-02-15 13:53:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3274 states, 3273 states have (on average 2.533761075465933) internal successors, (8293), 3273 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 8293 transitions. [2022-02-15 13:53:19,857 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 8293 transitions. Word has length 30 [2022-02-15 13:53:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:19,858 INFO L470 AbstractCegarLoop]: Abstraction has 3274 states and 8293 transitions. [2022-02-15 13:53:19,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 8293 transitions. [2022-02-15 13:53:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:19,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:19,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:19,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:20,077 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1920613664, now seen corresponding path program 72 times [2022-02-15 13:53:20,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:20,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475774626] [2022-02-15 13:53:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:20,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:20,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:20,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475774626] [2022-02-15 13:53:20,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475774626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:20,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925200647] [2022-02-15 13:53:20,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:20,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:20,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:20,270 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:20,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-15 13:53:20,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:53:20,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:20,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:53:20,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:20,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:53:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:20,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:20,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:53:20,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:53:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:21,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925200647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:21,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:21,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-15 13:53:21,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689893233] [2022-02-15 13:53:21,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:53:21,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:53:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:53:21,141 INFO L87 Difference]: Start difference. First operand 3274 states and 8293 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:53:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:23,358 INFO L93 Difference]: Finished difference Result 5594 states and 14277 transitions. [2022-02-15 13:53:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:53:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 30 [2022-02-15 13:53:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:23,367 INFO L225 Difference]: With dead ends: 5594 [2022-02-15 13:53:23,367 INFO L226 Difference]: Without dead ends: 5583 [2022-02-15 13:53:23,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=947, Invalid=6193, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:53:23,368 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 413 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2072 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:23,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 139 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1177 Invalid, 0 Unknown, 2072 Unchecked, 0.5s Time] [2022-02-15 13:53:23,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2022-02-15 13:53:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 3342. [2022-02-15 13:53:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 2.5372642921281052) internal successors, (8477), 3341 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 8477 transitions. [2022-02-15 13:53:23,417 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 8477 transitions. Word has length 30 [2022-02-15 13:53:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:23,417 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 8477 transitions. [2022-02-15 13:53:23,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 13:53:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 8477 transitions. [2022-02-15 13:53:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:23,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:23,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:23,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:23,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-15 13:53:23,637 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:23,637 INFO L85 PathProgramCache]: Analyzing trace with hash -164212614, now seen corresponding path program 73 times [2022-02-15 13:53:23,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:23,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948240458] [2022-02-15 13:53:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:23,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:23,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948240458] [2022-02-15 13:53:23,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948240458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413187736] [2022-02-15 13:53:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:23,855 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:23,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:23,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-15 13:53:24,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:53:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:24,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:24,277 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:24,277 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:24,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:24,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:24,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:24,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413187736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:24,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:24,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:24,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624237486] [2022-02-15 13:53:24,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:24,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:24,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:24,341 INFO L87 Difference]: Start difference. First operand 3342 states and 8477 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:26,128 INFO L93 Difference]: Finished difference Result 5259 states and 13386 transitions. [2022-02-15 13:53:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 13:53:26,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:53:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:26,134 INFO L225 Difference]: With dead ends: 5259 [2022-02-15 13:53:26,134 INFO L226 Difference]: Without dead ends: 5244 [2022-02-15 13:53:26,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=4947, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:53:26,135 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 376 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:26,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 194 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:53:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2022-02-15 13:53:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 3345. [2022-02-15 13:53:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 2.537081339712919) internal successors, (8484), 3344 states have internal predecessors, (8484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 8484 transitions. [2022-02-15 13:53:26,179 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 8484 transitions. Word has length 30 [2022-02-15 13:53:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:26,179 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 8484 transitions. [2022-02-15 13:53:26,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 8484 transitions. [2022-02-15 13:53:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:26,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:26,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:26,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:26,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-15 13:53:26,400 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 371231594, now seen corresponding path program 74 times [2022-02-15 13:53:26,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:26,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88607382] [2022-02-15 13:53:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:26,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:26,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:26,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88607382] [2022-02-15 13:53:26,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88607382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:26,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054409733] [2022-02-15 13:53:26,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:26,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:26,617 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:26,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-15 13:53:26,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:26,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:26,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:26,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:53:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:26,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:27,042 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:27,042 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:27,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:27,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:27,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:27,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054409733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:27,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:27,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:27,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767213652] [2022-02-15 13:53:27,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:27,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:27,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:27,112 INFO L87 Difference]: Start difference. First operand 3345 states and 8484 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:28,938 INFO L93 Difference]: Finished difference Result 5212 states and 13247 transitions. [2022-02-15 13:53:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:53:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 30 [2022-02-15 13:53:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:28,946 INFO L225 Difference]: With dead ends: 5212 [2022-02-15 13:53:28,946 INFO L226 Difference]: Without dead ends: 5202 [2022-02-15 13:53:28,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=3987, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:53:28,946 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 354 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:28,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 240 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:53:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2022-02-15 13:53:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3344. [2022-02-15 13:53:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 2.537241998205205) internal successors, (8482), 3343 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 8482 transitions. [2022-02-15 13:53:28,992 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 8482 transitions. Word has length 30 [2022-02-15 13:53:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:28,993 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 8482 transitions. [2022-02-15 13:53:28,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 8482 transitions. [2022-02-15 13:53:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:28,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:28,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:29,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:29,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:29,212 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1611738628, now seen corresponding path program 75 times [2022-02-15 13:53:29,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:29,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199248583] [2022-02-15 13:53:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:29,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:29,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:29,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199248583] [2022-02-15 13:53:29,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199248583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:29,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309324919] [2022-02-15 13:53:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:29,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:29,406 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:29,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-15 13:53:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:53:29,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:29,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:29,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:53:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:29,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:29,825 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:29,825 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:29,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:29,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:29,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:29,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:29,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309324919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:29,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:29,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:53:29,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213531989] [2022-02-15 13:53:29,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:29,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:29,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:29,898 INFO L87 Difference]: Start difference. First operand 3344 states and 8482 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:33,403 INFO L93 Difference]: Finished difference Result 6969 states and 17830 transitions. [2022-02-15 13:53:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:53:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:33,413 INFO L225 Difference]: With dead ends: 6969 [2022-02-15 13:53:33,413 INFO L226 Difference]: Without dead ends: 6941 [2022-02-15 13:53:33,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1191, Invalid=9315, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 13:53:33,413 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 496 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:33,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 198 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2867 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:53:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2022-02-15 13:53:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 3320. [2022-02-15 13:53:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5366074118710453) internal successors, (8419), 3319 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8419 transitions. [2022-02-15 13:53:33,468 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8419 transitions. Word has length 30 [2022-02-15 13:53:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:33,468 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8419 transitions. [2022-02-15 13:53:33,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8419 transitions. [2022-02-15 13:53:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:33,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:33,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:33,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:33,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-15 13:53:33,686 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1590653014, now seen corresponding path program 76 times [2022-02-15 13:53:33,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:33,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76788922] [2022-02-15 13:53:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:33,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:33,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:33,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76788922] [2022-02-15 13:53:33,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76788922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:33,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24730514] [2022-02-15 13:53:33,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:33,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:33,892 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:33,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-15 13:53:33,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:33,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:33,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:33,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:34,143 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:53:34,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-15 13:53:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:34,335 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:34,335 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:34,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:34,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24730514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:34,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:34,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:53:34,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757608007] [2022-02-15 13:53:34,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:34,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:34,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:34,403 INFO L87 Difference]: Start difference. First operand 3320 states and 8419 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:36,787 INFO L93 Difference]: Finished difference Result 5777 states and 14697 transitions. [2022-02-15 13:53:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:53:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:36,796 INFO L225 Difference]: With dead ends: 5777 [2022-02-15 13:53:36,796 INFO L226 Difference]: Without dead ends: 5758 [2022-02-15 13:53:36,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=873, Invalid=6267, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:53:36,797 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 483 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:36,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 236 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:53:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2022-02-15 13:53:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 3337. [2022-02-15 13:53:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 2.5365707434052758) internal successors, (8462), 3336 states have internal predecessors, (8462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 8462 transitions. [2022-02-15 13:53:36,846 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 8462 transitions. Word has length 30 [2022-02-15 13:53:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:36,846 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 8462 transitions. [2022-02-15 13:53:36,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 8462 transitions. [2022-02-15 13:53:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:36,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:36,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:36,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:37,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-02-15 13:53:37,065 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -947913232, now seen corresponding path program 77 times [2022-02-15 13:53:37,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:37,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337075352] [2022-02-15 13:53:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:37,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:37,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:37,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337075352] [2022-02-15 13:53:37,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337075352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:37,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035893095] [2022-02-15 13:53:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:37,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:37,342 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:37,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-15 13:53:37,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:53:37,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:37,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:37,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:37,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:37,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:37,992 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:38,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:38,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:38,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:38,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035893095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:38,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:38,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:38,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693262585] [2022-02-15 13:53:38,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:38,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:38,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:38,107 INFO L87 Difference]: Start difference. First operand 3337 states and 8462 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:41,170 INFO L93 Difference]: Finished difference Result 5431 states and 13818 transitions. [2022-02-15 13:53:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:53:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:53:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:41,177 INFO L225 Difference]: With dead ends: 5431 [2022-02-15 13:53:41,177 INFO L226 Difference]: Without dead ends: 5410 [2022-02-15 13:53:41,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=796, Invalid=5846, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 13:53:41,178 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 472 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:41,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 212 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:53:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-02-15 13:53:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 3339. [2022-02-15 13:53:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.536249251048532) internal successors, (8466), 3338 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8466 transitions. [2022-02-15 13:53:41,222 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8466 transitions. Word has length 30 [2022-02-15 13:53:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:41,222 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 8466 transitions. [2022-02-15 13:53:41,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8466 transitions. [2022-02-15 13:53:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:41,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:41,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:41,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-15 13:53:41,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-15 13:53:41,442 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:41,442 INFO L85 PathProgramCache]: Analyzing trace with hash -412469024, now seen corresponding path program 78 times [2022-02-15 13:53:41,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:41,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271481953] [2022-02-15 13:53:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:41,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:41,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:41,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271481953] [2022-02-15 13:53:41,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271481953] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:41,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149337881] [2022-02-15 13:53:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:53:41,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:41,637 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:41,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-15 13:53:41,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:53:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:41,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:41,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:41,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-15 13:53:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:42,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:42,237 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:42,237 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:42,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:42,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149337881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:42,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:42,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:42,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307878984] [2022-02-15 13:53:42,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:42,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:42,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:42,356 INFO L87 Difference]: Start difference. First operand 3339 states and 8466 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:45,239 INFO L93 Difference]: Finished difference Result 5258 states and 13355 transitions. [2022-02-15 13:53:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:53:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 30 [2022-02-15 13:53:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:45,247 INFO L225 Difference]: With dead ends: 5258 [2022-02-15 13:53:45,247 INFO L226 Difference]: Without dead ends: 5248 [2022-02-15 13:53:45,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=564, Invalid=4406, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:53:45,248 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 427 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:45,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 235 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:53:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2022-02-15 13:53:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 3336. [2022-02-15 13:53:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.536431784107946) internal successors, (8459), 3335 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8459 transitions. [2022-02-15 13:53:45,293 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8459 transitions. Word has length 30 [2022-02-15 13:53:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:45,293 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 8459 transitions. [2022-02-15 13:53:45,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8459 transitions. [2022-02-15 13:53:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:45,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:45,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:45,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:45,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-15 13:53:45,507 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -7722886, now seen corresponding path program 79 times [2022-02-15 13:53:45,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:45,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263510031] [2022-02-15 13:53:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:45,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:45,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:45,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263510031] [2022-02-15 13:53:45,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263510031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:45,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813762336] [2022-02-15 13:53:45,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:53:45,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:45,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:45,776 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:45,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-15 13:53:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:45,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:46,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:46,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:46,184 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:46,184 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:46,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:46,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813762336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:46,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:46,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:46,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475918812] [2022-02-15 13:53:46,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:46,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:46,258 INFO L87 Difference]: Start difference. First operand 3336 states and 8459 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:47,922 INFO L93 Difference]: Finished difference Result 5235 states and 13294 transitions. [2022-02-15 13:53:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:53:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 30 [2022-02-15 13:53:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:47,930 INFO L225 Difference]: With dead ends: 5235 [2022-02-15 13:53:47,931 INFO L226 Difference]: Without dead ends: 5225 [2022-02-15 13:53:47,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:53:47,931 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:47,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 321 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:53:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2022-02-15 13:53:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 3329. [2022-02-15 13:53:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 3328 states have (on average 2.5360576923076925) internal successors, (8440), 3328 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 8440 transitions. [2022-02-15 13:53:47,982 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 8440 transitions. Word has length 30 [2022-02-15 13:53:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:47,982 INFO L470 AbstractCegarLoop]: Abstraction has 3329 states and 8440 transitions. [2022-02-15 13:53:47,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:53:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 8440 transitions. [2022-02-15 13:53:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:47,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:47,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:48,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:48,202 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 40851758, now seen corresponding path program 80 times [2022-02-15 13:53:48,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:48,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439765465] [2022-02-15 13:53:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:48,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:48,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:48,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439765465] [2022-02-15 13:53:48,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439765465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:48,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789619685] [2022-02-15 13:53:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:53:48,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:48,421 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:48,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-15 13:53:48,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:53:48,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:48,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:48,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:53:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:48,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:48,921 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:48,921 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:48,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:49,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789619685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:49,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:49,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:53:49,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62024464] [2022-02-15 13:53:49,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:49,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:53:49,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:53:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:53:49,023 INFO L87 Difference]: Start difference. First operand 3329 states and 8440 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:53:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:51,444 INFO L93 Difference]: Finished difference Result 5478 states and 13808 transitions. [2022-02-15 13:53:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:53:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:53:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:51,452 INFO L225 Difference]: With dead ends: 5478 [2022-02-15 13:53:51,452 INFO L226 Difference]: Without dead ends: 5448 [2022-02-15 13:53:51,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=663, Invalid=4167, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:53:51,453 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 474 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:51,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 275 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:53:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2022-02-15 13:53:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 3315. [2022-02-15 13:53:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.535003017501509) internal successors, (8401), 3314 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8401 transitions. [2022-02-15 13:53:51,506 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8401 transitions. Word has length 30 [2022-02-15 13:53:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:51,507 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 8401 transitions. [2022-02-15 13:53:51,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:53:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8401 transitions. [2022-02-15 13:53:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:51,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:51,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:51,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-15 13:53:51,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:51,723 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash 85567790, now seen corresponding path program 81 times [2022-02-15 13:53:51,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:51,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212800783] [2022-02-15 13:53:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:51,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:52,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:52,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212800783] [2022-02-15 13:53:52,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212800783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:52,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657134278] [2022-02-15 13:53:52,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:53:52,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:52,028 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:52,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-15 13:53:52,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:53:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:52,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:52,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:52,403 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:53:52,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-15 13:53:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:52,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:52,682 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:52,683 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:52,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:52,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:52,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657134278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:52,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:52,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:53:52,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657418499] [2022-02-15 13:53:52,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:52,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:52,787 INFO L87 Difference]: Start difference. First operand 3315 states and 8401 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:55,228 INFO L93 Difference]: Finished difference Result 5232 states and 13255 transitions. [2022-02-15 13:53:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:53:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:55,235 INFO L225 Difference]: With dead ends: 5232 [2022-02-15 13:53:55,235 INFO L226 Difference]: Without dead ends: 5213 [2022-02-15 13:53:55,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=649, Invalid=4753, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:53:55,236 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 455 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:55,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 185 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:53:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-02-15 13:53:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 3313. [2022-02-15 13:53:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.5344202898550723) internal successors, (8394), 3312 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 8394 transitions. [2022-02-15 13:53:55,277 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 8394 transitions. Word has length 30 [2022-02-15 13:53:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:55,277 INFO L470 AbstractCegarLoop]: Abstraction has 3313 states and 8394 transitions. [2022-02-15 13:53:55,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 8394 transitions. [2022-02-15 13:53:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:55,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:55,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:55,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-02-15 13:53:55,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2022-02-15 13:53:55,496 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash 507897328, now seen corresponding path program 82 times [2022-02-15 13:53:55,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:55,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834313483] [2022-02-15 13:53:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:55,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:55,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:55,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834313483] [2022-02-15 13:53:55,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834313483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:55,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647321965] [2022-02-15 13:53:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:53:55,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:55,726 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:55,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-15 13:53:55,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:53:55,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:55,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:55,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:53:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:56,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:56,233 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:56,233 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:56,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:56,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:56,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:53:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:56,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647321965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:56,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:56,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:53:56,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392917479] [2022-02-15 13:53:56,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:56,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:53:56,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:56,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:53:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:53:56,348 INFO L87 Difference]: Start difference. First operand 3313 states and 8394 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:53:58,669 INFO L93 Difference]: Finished difference Result 6153 states and 15686 transitions. [2022-02-15 13:53:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:53:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:53:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:53:58,679 INFO L225 Difference]: With dead ends: 6153 [2022-02-15 13:53:58,679 INFO L226 Difference]: Without dead ends: 6134 [2022-02-15 13:53:58,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=755, Invalid=5887, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 13:53:58,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 445 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:53:58,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 195 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:53:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-02-15 13:53:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 3315. [2022-02-15 13:53:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5343995171997586) internal successors, (8399), 3314 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:53:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8399 transitions. [2022-02-15 13:53:58,738 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8399 transitions. Word has length 30 [2022-02-15 13:53:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:53:58,738 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 8399 transitions. [2022-02-15 13:53:58,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:53:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8399 transitions. [2022-02-15 13:53:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:53:58,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:53:58,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:53:58,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-15 13:53:58,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:58,957 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:53:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:53:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2030668918, now seen corresponding path program 83 times [2022-02-15 13:53:58,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:53:58,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654383148] [2022-02-15 13:53:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:53:58,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:53:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:53:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:59,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:53:59,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654383148] [2022-02-15 13:53:59,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654383148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:53:59,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26728047] [2022-02-15 13:53:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:53:59,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:53:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:53:59,280 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:53:59,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-15 13:53:59,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:53:59,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:53:59,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:53:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:53:59,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:53:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:59,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:53:59,867 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:53:59,868 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:53:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:53:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:53:59,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:53:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:53:59,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26728047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:53:59,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:53:59,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:53:59,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83973958] [2022-02-15 13:53:59,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:53:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:53:59,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:53:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:53:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:53:59,948 INFO L87 Difference]: Start difference. First operand 3315 states and 8399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:01,752 INFO L93 Difference]: Finished difference Result 5244 states and 13339 transitions. [2022-02-15 13:54:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 13:54:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:54:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:01,760 INFO L225 Difference]: With dead ends: 5244 [2022-02-15 13:54:01,760 INFO L226 Difference]: Without dead ends: 5223 [2022-02-15 13:54:01,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=615, Invalid=5237, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:54:01,761 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 355 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 197 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:54:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2022-02-15 13:54:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 3316. [2022-02-15 13:54:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 2.534238310708899) internal successors, (8401), 3315 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 8401 transitions. [2022-02-15 13:54:01,832 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 8401 transitions. Word has length 30 [2022-02-15 13:54:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:01,833 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 8401 transitions. [2022-02-15 13:54:01,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 8401 transitions. [2022-02-15 13:54:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:01,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:01,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:01,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:02,052 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1495224710, now seen corresponding path program 84 times [2022-02-15 13:54:02,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:02,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345870487] [2022-02-15 13:54:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:02,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:02,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:02,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345870487] [2022-02-15 13:54:02,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345870487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:02,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962093843] [2022-02-15 13:54:02,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:54:02,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:02,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:02,234 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:02,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-15 13:54:02,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:54:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:02,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:54:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:02,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:02,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:54:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:02,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:02,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:02,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:02,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:02,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:54:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:02,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962093843] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:02,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:02,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-15 13:54:02,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071486556] [2022-02-15 13:54:02,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:02,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:54:02,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:54:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:54:02,981 INFO L87 Difference]: Start difference. First operand 3316 states and 8401 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 13:54:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:04,803 INFO L93 Difference]: Finished difference Result 5472 states and 13960 transitions. [2022-02-15 13:54:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:54:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 30 [2022-02-15 13:54:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:04,810 INFO L225 Difference]: With dead ends: 5472 [2022-02-15 13:54:04,810 INFO L226 Difference]: Without dead ends: 5462 [2022-02-15 13:54:04,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=735, Invalid=5117, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:54:04,811 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 441 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2285 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:04,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 174 Invalid, 3923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1383 Invalid, 0 Unknown, 2285 Unchecked, 0.5s Time] [2022-02-15 13:54:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2022-02-15 13:54:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 3389. [2022-02-15 13:54:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 2.5374852420306966) internal successors, (8597), 3388 states have internal predecessors, (8597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 8597 transitions. [2022-02-15 13:54:04,856 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 8597 transitions. Word has length 30 [2022-02-15 13:54:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:04,856 INFO L470 AbstractCegarLoop]: Abstraction has 3389 states and 8597 transitions. [2022-02-15 13:54:04,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 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 13:54:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 8597 transitions. [2022-02-15 13:54:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:04,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:04,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:04,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-15 13:54:05,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:05,075 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 680298034, now seen corresponding path program 85 times [2022-02-15 13:54:05,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:05,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152904017] [2022-02-15 13:54:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:05,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:05,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:05,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152904017] [2022-02-15 13:54:05,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152904017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:05,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328985511] [2022-02-15 13:54:05,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:54:05,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:05,315 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:05,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-15 13:54:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:05,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:05,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:54:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:05,723 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:05,724 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:05,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:05,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:05,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328985511] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:05,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:05,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:54:05,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069291589] [2022-02-15 13:54:05,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:05,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:54:05,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:54:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:54:05,796 INFO L87 Difference]: Start difference. First operand 3389 states and 8597 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:54:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:07,422 INFO L93 Difference]: Finished difference Result 5578 states and 14153 transitions. [2022-02-15 13:54:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:54:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:54:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:07,430 INFO L225 Difference]: With dead ends: 5578 [2022-02-15 13:54:07,430 INFO L226 Difference]: Without dead ends: 5555 [2022-02-15 13:54:07,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=4131, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:54:07,430 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 375 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:07,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 201 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:54:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2022-02-15 13:54:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 3408. [2022-02-15 13:54:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 3407 states have (on average 2.53742295274435) internal successors, (8645), 3407 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 8645 transitions. [2022-02-15 13:54:07,478 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 8645 transitions. Word has length 30 [2022-02-15 13:54:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:07,478 INFO L470 AbstractCegarLoop]: Abstraction has 3408 states and 8645 transitions. [2022-02-15 13:54:07,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:54:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 8645 transitions. [2022-02-15 13:54:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:07,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:07,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:07,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:07,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-15 13:54:07,698 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -570465176, now seen corresponding path program 86 times [2022-02-15 13:54:07,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:07,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799741431] [2022-02-15 13:54:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:07,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:07,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:07,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799741431] [2022-02-15 13:54:07,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799741431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:07,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034899375] [2022-02-15 13:54:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:54:07,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:07,889 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:07,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-15 13:54:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:54:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:07,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:08,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:54:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:08,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:08,343 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:08,343 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:08,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:08,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:08,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:54:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:08,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034899375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:08,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:08,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:54:08,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16809092] [2022-02-15 13:54:08,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:08,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:54:08,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:54:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:54:08,417 INFO L87 Difference]: Start difference. First operand 3408 states and 8645 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:54:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:09,727 INFO L93 Difference]: Finished difference Result 5638 states and 14209 transitions. [2022-02-15 13:54:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:54:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 30 [2022-02-15 13:54:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:09,736 INFO L225 Difference]: With dead ends: 5638 [2022-02-15 13:54:09,736 INFO L226 Difference]: Without dead ends: 5627 [2022-02-15 13:54:09,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=462, Invalid=3198, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:54:09,737 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 391 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:09,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 316 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:54:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5627 states. [2022-02-15 13:54:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5627 to 3408. [2022-02-15 13:54:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 3407 states have (on average 2.53742295274435) internal successors, (8645), 3407 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 8645 transitions. [2022-02-15 13:54:09,792 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 8645 transitions. Word has length 30 [2022-02-15 13:54:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 3408 states and 8645 transitions. [2022-02-15 13:54:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 13:54:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 8645 transitions. [2022-02-15 13:54:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:09,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:09,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:09,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:10,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-15 13:54:10,005 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1066391498, now seen corresponding path program 82 times [2022-02-15 13:54:10,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:10,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856010950] [2022-02-15 13:54:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:10,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:10,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:10,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856010950] [2022-02-15 13:54:10,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856010950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:10,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046278938] [2022-02-15 13:54:10,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:10,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:10,302 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:10,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-15 13:54:10,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:10,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:10,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:54:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:10,751 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:10,751 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:10,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:10,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:10,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:10,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046278938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:10,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:10,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:54:10,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300212188] [2022-02-15 13:54:10,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:10,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:54:10,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:54:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:54:10,819 INFO L87 Difference]: Start difference. First operand 3408 states and 8645 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:54:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:14,370 INFO L93 Difference]: Finished difference Result 5628 states and 14130 transitions. [2022-02-15 13:54:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:54:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 30 [2022-02-15 13:54:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:14,378 INFO L225 Difference]: With dead ends: 5628 [2022-02-15 13:54:14,379 INFO L226 Difference]: Without dead ends: 5606 [2022-02-15 13:54:14,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1255, Invalid=10517, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 13:54:14,380 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:14,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 206 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3336 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 13:54:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2022-02-15 13:54:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 3396. [2022-02-15 13:54:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.538144329896907) internal successors, (8617), 3395 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8617 transitions. [2022-02-15 13:54:14,430 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8617 transitions. Word has length 30 [2022-02-15 13:54:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:14,430 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 8617 transitions. [2022-02-15 13:54:14,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 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 13:54:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8617 transitions. [2022-02-15 13:54:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:14,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:14,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:14,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:14,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:14,649 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash 508653024, now seen corresponding path program 87 times [2022-02-15 13:54:14,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:14,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899840204] [2022-02-15 13:54:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:14,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:14,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:14,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899840204] [2022-02-15 13:54:14,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899840204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:14,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229578656] [2022-02-15 13:54:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:14,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:14,915 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:14,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-15 13:54:14,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:54:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:14,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:15,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:54:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:15,348 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:15,349 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:15,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:15,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229578656] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:15,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:15,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:54:15,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981207032] [2022-02-15 13:54:15,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:54:15,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:54:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:54:15,422 INFO L87 Difference]: Start difference. First operand 3396 states and 8617 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:54:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:17,211 INFO L93 Difference]: Finished difference Result 5324 states and 13524 transitions. [2022-02-15 13:54:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:54:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 30 [2022-02-15 13:54:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:17,219 INFO L225 Difference]: With dead ends: 5324 [2022-02-15 13:54:17,220 INFO L226 Difference]: Without dead ends: 5314 [2022-02-15 13:54:17,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=4121, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:54:17,220 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:17,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 274 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:54:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2022-02-15 13:54:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3382. [2022-02-15 13:54:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 2.538893818396924) internal successors, (8584), 3381 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 8584 transitions. [2022-02-15 13:54:17,289 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 8584 transitions. Word has length 30 [2022-02-15 13:54:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:17,289 INFO L470 AbstractCegarLoop]: Abstraction has 3382 states and 8584 transitions. [2022-02-15 13:54:17,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 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 13:54:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 8584 transitions. [2022-02-15 13:54:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:17,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:17,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:17,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-15 13:54:17,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:17,507 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 279347744, now seen corresponding path program 83 times [2022-02-15 13:54:17,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:17,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428947681] [2022-02-15 13:54:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:17,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:17,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:17,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428947681] [2022-02-15 13:54:17,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428947681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:17,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99864844] [2022-02-15 13:54:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:54:17,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:17,709 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:17,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-15 13:54:17,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:54:17,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:17,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:17,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:54:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:18,159 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:18,159 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:18,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:18,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99864844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:18,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:18,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:54:18,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36329190] [2022-02-15 13:54:18,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:18,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:18,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:18,263 INFO L87 Difference]: Start difference. First operand 3382 states and 8584 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 13:54:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:20,090 INFO L93 Difference]: Finished difference Result 5812 states and 14819 transitions. [2022-02-15 13:54:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:54:20,090 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 30 [2022-02-15 13:54:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:20,097 INFO L225 Difference]: With dead ends: 5812 [2022-02-15 13:54:20,097 INFO L226 Difference]: Without dead ends: 5803 [2022-02-15 13:54:20,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:54:20,110 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 237 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:20,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 344 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:54:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2022-02-15 13:54:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 3394. [2022-02-15 13:54:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 2.539050987326849) internal successors, (8615), 3393 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 8615 transitions. [2022-02-15 13:54:20,152 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 8615 transitions. Word has length 30 [2022-02-15 13:54:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 3394 states and 8615 transitions. [2022-02-15 13:54:20,153 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 13:54:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 8615 transitions. [2022-02-15 13:54:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:20,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:20,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:20,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-02-15 13:54:20,372 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1055119168, now seen corresponding path program 84 times [2022-02-15 13:54:20,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:20,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331002829] [2022-02-15 13:54:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:20,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:20,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:20,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331002829] [2022-02-15 13:54:20,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331002829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:20,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351151458] [2022-02-15 13:54:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:54:20,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:20,608 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:20,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-15 13:54:20,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:54:20,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:20,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:20,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:54:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:20,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:21,131 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:21,131 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:21,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:21,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:21,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351151458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:21,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:21,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:54:21,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505591846] [2022-02-15 13:54:21,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:21,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:21,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:21,201 INFO L87 Difference]: Start difference. First operand 3394 states and 8615 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:54:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:22,967 INFO L93 Difference]: Finished difference Result 5879 states and 15019 transitions. [2022-02-15 13:54:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:54:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 30 [2022-02-15 13:54:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:22,975 INFO L225 Difference]: With dead ends: 5879 [2022-02-15 13:54:22,975 INFO L226 Difference]: Without dead ends: 5868 [2022-02-15 13:54:22,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=541, Invalid=3491, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:54:22,976 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 310 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:22,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 209 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:54:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2022-02-15 13:54:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 3421. [2022-02-15 13:54:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 2.5391812865497077) internal successors, (8684), 3420 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 8684 transitions. [2022-02-15 13:54:23,024 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 8684 transitions. Word has length 30 [2022-02-15 13:54:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 3421 states and 8684 transitions. [2022-02-15 13:54:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 13:54:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 8684 transitions. [2022-02-15 13:54:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:23,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:23,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:23,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:23,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:23,241 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1720322336, now seen corresponding path program 85 times [2022-02-15 13:54:23,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:23,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916505491] [2022-02-15 13:54:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:23,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:23,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:23,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916505491] [2022-02-15 13:54:23,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916505491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:23,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560479510] [2022-02-15 13:54:23,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:54:23,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:23,500 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:23,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-15 13:54:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:23,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:23,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:54:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:23,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:24,134 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:24,135 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:54:24,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:24,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:24,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:24,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:24,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560479510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:24,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:24,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-15 13:54:24,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976206459] [2022-02-15 13:54:24,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:24,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:54:24,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:24,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:54:24,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:54:24,255 INFO L87 Difference]: Start difference. First operand 3421 states and 8684 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:54:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:26,099 INFO L93 Difference]: Finished difference Result 5585 states and 14256 transitions. [2022-02-15 13:54:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:54:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 30 [2022-02-15 13:54:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:26,107 INFO L225 Difference]: With dead ends: 5585 [2022-02-15 13:54:26,108 INFO L226 Difference]: Without dead ends: 5564 [2022-02-15 13:54:26,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=536, Invalid=3496, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:54:26,108 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 345 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:26,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 257 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:54:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2022-02-15 13:54:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 3419. [2022-02-15 13:54:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 2.5392042129900525) internal successors, (8679), 3418 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 8679 transitions. [2022-02-15 13:54:26,159 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 8679 transitions. Word has length 30 [2022-02-15 13:54:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:26,159 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 8679 transitions. [2022-02-15 13:54:26,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 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 13:54:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 8679 transitions. [2022-02-15 13:54:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:26,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:26,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:26,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:26,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:26,379 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1576391650, now seen corresponding path program 86 times [2022-02-15 13:54:26,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:26,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079305082] [2022-02-15 13:54:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:26,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:26,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:26,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079305082] [2022-02-15 13:54:26,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079305082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:26,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562459762] [2022-02-15 13:54:26,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:54:26,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:26,558 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-15 13:54:26,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:54:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:26,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:26,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:54:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:26,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:27,004 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:27,004 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:27,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:27,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:27,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:27,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562459762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:27,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:27,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:54:27,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346517295] [2022-02-15 13:54:27,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:27,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:27,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:27,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:27,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:27,077 INFO L87 Difference]: Start difference. First operand 3419 states and 8679 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 13:54:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:28,344 INFO L93 Difference]: Finished difference Result 5853 states and 14935 transitions. [2022-02-15 13:54:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:54:28,344 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 30 [2022-02-15 13:54:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:28,354 INFO L225 Difference]: With dead ends: 5853 [2022-02-15 13:54:28,354 INFO L226 Difference]: Without dead ends: 5844 [2022-02-15 13:54:28,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:54:28,355 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:28,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 292 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:54:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2022-02-15 13:54:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 3410. [2022-02-15 13:54:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.5388677031387505) internal successors, (8655), 3409 states have internal predecessors, (8655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 8655 transitions. [2022-02-15 13:54:28,415 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 8655 transitions. Word has length 30 [2022-02-15 13:54:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:28,415 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 8655 transitions. [2022-02-15 13:54:28,415 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 13:54:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 8655 transitions. [2022-02-15 13:54:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:28,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:28,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:28,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:28,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:28,636 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 221356764, now seen corresponding path program 87 times [2022-02-15 13:54:28,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:28,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028947455] [2022-02-15 13:54:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:28,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:28,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:28,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028947455] [2022-02-15 13:54:28,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028947455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:28,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634200718] [2022-02-15 13:54:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:28,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:28,910 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:28,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-15 13:54:28,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:54:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:28,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:29,280 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-15 13:54:29,280 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 104 treesize of output 76 [2022-02-15 13:54:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:29,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:29,569 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:29,569 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:29,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:29,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:29,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:29,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:29,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634200718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:29,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:29,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:54:29,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345909964] [2022-02-15 13:54:29,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:29,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:54:29,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:54:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:54:29,675 INFO L87 Difference]: Start difference. First operand 3410 states and 8655 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 13:54:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:31,997 INFO L93 Difference]: Finished difference Result 6137 states and 15618 transitions. [2022-02-15 13:54:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:54:31,997 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 30 [2022-02-15 13:54:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:32,007 INFO L225 Difference]: With dead ends: 6137 [2022-02-15 13:54:32,007 INFO L226 Difference]: Without dead ends: 6126 [2022-02-15 13:54:32,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:54:32,008 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 370 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:32,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 244 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:54:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-02-15 13:54:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3439. [2022-02-15 13:54:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 2.5386852821407797) internal successors, (8728), 3438 states have internal predecessors, (8728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 8728 transitions. [2022-02-15 13:54:32,056 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 8728 transitions. Word has length 30 [2022-02-15 13:54:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:32,056 INFO L470 AbstractCegarLoop]: Abstraction has 3439 states and 8728 transitions. [2022-02-15 13:54:32,056 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 13:54:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 8728 transitions. [2022-02-15 13:54:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:32,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:32,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:32,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-02-15 13:54:32,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:32,275 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1977757814, now seen corresponding path program 88 times [2022-02-15 13:54:32,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:32,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391562980] [2022-02-15 13:54:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:32,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:32,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:32,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391562980] [2022-02-15 13:54:32,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391562980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:32,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531262495] [2022-02-15 13:54:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:32,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:32,552 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:32,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-15 13:54:32,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:32,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:32,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:32,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:54:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:32,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:32,999 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:32,999 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:54:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:33,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:33,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531262495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:33,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:33,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:54:33,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148656972] [2022-02-15 13:54:33,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:33,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:54:33,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:54:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:54:33,065 INFO L87 Difference]: Start difference. First operand 3439 states and 8728 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:54:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:35,110 INFO L93 Difference]: Finished difference Result 6221 states and 15826 transitions. [2022-02-15 13:54:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:54:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:54:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:35,118 INFO L225 Difference]: With dead ends: 6221 [2022-02-15 13:54:35,118 INFO L226 Difference]: Without dead ends: 6177 [2022-02-15 13:54:35,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=6312, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:54:35,119 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 458 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:35,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 278 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:54:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-02-15 13:54:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 3439. [2022-02-15 13:54:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 2.5378126817917392) internal successors, (8725), 3438 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 8725 transitions. [2022-02-15 13:54:35,160 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 8725 transitions. Word has length 30 [2022-02-15 13:54:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:35,160 INFO L470 AbstractCegarLoop]: Abstraction has 3439 states and 8725 transitions. [2022-02-15 13:54:35,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:54:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 8725 transitions. [2022-02-15 13:54:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:35,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:35,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:35,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:35,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-15 13:54:35,385 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -788255414, now seen corresponding path program 89 times [2022-02-15 13:54:35,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:35,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294087449] [2022-02-15 13:54:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:35,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:35,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:35,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294087449] [2022-02-15 13:54:35,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294087449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:35,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600270075] [2022-02-15 13:54:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:54:35,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:35,591 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:35,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-15 13:54:35,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:54:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:35,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:35,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-15 13:54:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:36,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:36,203 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:36,204 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:54:36,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:36,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:36,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:36,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600270075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:36,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:36,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-02-15 13:54:36,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849164308] [2022-02-15 13:54:36,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:54:36,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:54:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:54:36,288 INFO L87 Difference]: Start difference. First operand 3439 states and 8725 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 13:54:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:38,590 INFO L93 Difference]: Finished difference Result 5643 states and 14221 transitions. [2022-02-15 13:54:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:54:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 30 [2022-02-15 13:54:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:38,598 INFO L225 Difference]: With dead ends: 5643 [2022-02-15 13:54:38,598 INFO L226 Difference]: Without dead ends: 5599 [2022-02-15 13:54:38,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:54:38,599 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 510 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 3288 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:38,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 315 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3288 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:54:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2022-02-15 13:54:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 3426. [2022-02-15 13:54:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 2.538102189781022) internal successors, (8693), 3425 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 8693 transitions. [2022-02-15 13:54:38,644 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 8693 transitions. Word has length 30 [2022-02-15 13:54:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:38,644 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 8693 transitions. [2022-02-15 13:54:38,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 13:54:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 8693 transitions. [2022-02-15 13:54:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:38,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:38,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:38,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-15 13:54:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-15 13:54:38,863 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 285990270, now seen corresponding path program 90 times [2022-02-15 13:54:38,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:38,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523998118] [2022-02-15 13:54:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:39,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:39,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523998118] [2022-02-15 13:54:39,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523998118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:39,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369115068] [2022-02-15 13:54:39,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:54:39,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:39,117 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:39,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-15 13:54:39,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:54:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:39,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:54:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:39,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:39,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2022-02-15 13:54:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:40,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:40,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:40,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-15 13:54:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:40,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369115068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:40,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:40,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-02-15 13:54:40,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654535611] [2022-02-15 13:54:40,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:40,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:54:40,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:54:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:54:40,427 INFO L87 Difference]: Start difference. First operand 3426 states and 8693 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 13:54:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:43,716 INFO L93 Difference]: Finished difference Result 5876 states and 14966 transitions. [2022-02-15 13:54:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:54:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 30 [2022-02-15 13:54:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:43,724 INFO L225 Difference]: With dead ends: 5876 [2022-02-15 13:54:43,725 INFO L226 Difference]: Without dead ends: 5865 [2022-02-15 13:54:43,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1191, Invalid=7181, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 13:54:43,725 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 430 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1422 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:43,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 166 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1860 Invalid, 0 Unknown, 1422 Unchecked, 0.9s Time] [2022-02-15 13:54:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2022-02-15 13:54:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 3495. [2022-02-15 13:54:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 2.5397824842587293) internal successors, (8874), 3494 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 8874 transitions. [2022-02-15 13:54:43,779 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 8874 transitions. Word has length 30 [2022-02-15 13:54:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 8874 transitions. [2022-02-15 13:54:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 13:54:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 8874 transitions. [2022-02-15 13:54:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:43,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:43,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:43,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:43,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-15 13:54:43,998 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:43,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2042391320, now seen corresponding path program 91 times [2022-02-15 13:54:43,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:43,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900758706] [2022-02-15 13:54:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:43,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:44,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:44,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900758706] [2022-02-15 13:54:44,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900758706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:44,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637975920] [2022-02-15 13:54:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:54:44,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:44,308 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:44,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-15 13:54:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:44,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:44,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:44,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:54:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:44,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:44,897 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:44,898 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:54:44,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:44,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:45,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637975920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:45,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:45,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:54:45,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871151827] [2022-02-15 13:54:45,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:45,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:54:45,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:54:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:54:45,019 INFO L87 Difference]: Start difference. First operand 3495 states and 8874 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:54:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:46,871 INFO L93 Difference]: Finished difference Result 6046 states and 15408 transitions. [2022-02-15 13:54:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:54:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:54:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:46,881 INFO L225 Difference]: With dead ends: 6046 [2022-02-15 13:54:46,881 INFO L226 Difference]: Without dead ends: 6013 [2022-02-15 13:54:46,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:54:46,882 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 376 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:46,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 219 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:54:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2022-02-15 13:54:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 3501. [2022-02-15 13:54:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 2.539142857142857) internal successors, (8887), 3500 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 8887 transitions. [2022-02-15 13:54:46,938 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 8887 transitions. Word has length 30 [2022-02-15 13:54:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:46,938 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 8887 transitions. [2022-02-15 13:54:46,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:54:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 8887 transitions. [2022-02-15 13:54:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:46,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:46,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:46,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:47,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:47,143 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1442156164, now seen corresponding path program 92 times [2022-02-15 13:54:47,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:47,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022519896] [2022-02-15 13:54:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:47,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:47,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:47,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022519896] [2022-02-15 13:54:47,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022519896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:47,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435152069] [2022-02-15 13:54:47,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:54:47,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:47,374 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:47,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-15 13:54:47,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:54:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:47,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:47,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-15 13:54:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:47,975 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:47,976 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:48,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:48,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:54:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:48,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435152069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:48,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:48,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:54:48,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318687920] [2022-02-15 13:54:48,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:48,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:48,112 INFO L87 Difference]: Start difference. First operand 3501 states and 8887 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 13:54:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:50,705 INFO L93 Difference]: Finished difference Result 6562 states and 16813 transitions. [2022-02-15 13:54:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:54:50,705 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 30 [2022-02-15 13:54:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:50,716 INFO L225 Difference]: With dead ends: 6562 [2022-02-15 13:54:50,716 INFO L226 Difference]: Without dead ends: 6545 [2022-02-15 13:54:50,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=743, Invalid=4957, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:54:50,717 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 318 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:50,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 195 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:54:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2022-02-15 13:54:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 3483. [2022-02-15 13:54:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.539345203905801) internal successors, (8842), 3482 states have internal predecessors, (8842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 8842 transitions. [2022-02-15 13:54:50,776 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 8842 transitions. Word has length 30 [2022-02-15 13:54:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:50,776 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 8842 transitions. [2022-02-15 13:54:50,777 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 13:54:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 8842 transitions. [2022-02-15 13:54:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:50,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:50,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:50,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:50,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:50,987 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:50,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2138600060, now seen corresponding path program 93 times [2022-02-15 13:54:50,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:50,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520920346] [2022-02-15 13:54:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:50,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:51,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:51,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520920346] [2022-02-15 13:54:51,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520920346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:51,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858211248] [2022-02-15 13:54:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:54:51,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:51,273 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:51,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-15 13:54:51,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:54:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:51,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:54:51,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:51,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:51,700 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 3 case distinctions, treesize of input 25 treesize of output 41 [2022-02-15 13:54:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:52,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:54:52,528 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-02-15 13:54:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:52,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858211248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:52,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:52,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-02-15 13:54:52,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559343718] [2022-02-15 13:54:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 13:54:52,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 13:54:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:54:52,608 INFO L87 Difference]: Start difference. First operand 3483 states and 8842 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 13:54:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:55,678 INFO L93 Difference]: Finished difference Result 6494 states and 16474 transitions. [2022-02-15 13:54:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:54:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 30 [2022-02-15 13:54:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:55,688 INFO L225 Difference]: With dead ends: 6494 [2022-02-15 13:54:55,688 INFO L226 Difference]: Without dead ends: 6485 [2022-02-15 13:54:55,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=740, Invalid=5422, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:54:55,689 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 355 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 3819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1158 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:55,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 289 Invalid, 3819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2464 Invalid, 0 Unknown, 1158 Unchecked, 1.1s Time] [2022-02-15 13:54:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6485 states. [2022-02-15 13:54:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6485 to 3492. [2022-02-15 13:54:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.539386995130335) internal successors, (8865), 3491 states have internal predecessors, (8865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8865 transitions. [2022-02-15 13:54:55,742 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8865 transitions. Word has length 30 [2022-02-15 13:54:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:55,742 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 8865 transitions. [2022-02-15 13:54:55,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 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 13:54:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8865 transitions. [2022-02-15 13:54:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:55,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:55,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:55,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:55,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-15 13:54:55,955 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -739905714, now seen corresponding path program 88 times [2022-02-15 13:54:55,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:55,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572990292] [2022-02-15 13:54:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:55,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:56,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:56,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572990292] [2022-02-15 13:54:56,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572990292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:56,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418641710] [2022-02-15 13:54:56,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:54:56,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:56,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:56,267 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:56,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-15 13:54:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:54:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:56,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:56,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-15 13:54:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:56,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:54:56,928 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:54:56,928 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:54:56,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:54:56,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:54:56,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:54:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:57,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418641710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:54:57,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:54:57,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-15 13:54:57,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636101242] [2022-02-15 13:54:57,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:54:57,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:54:57,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:54:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:54:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:54:57,033 INFO L87 Difference]: Start difference. First operand 3492 states and 8865 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 13:54:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:54:58,920 INFO L93 Difference]: Finished difference Result 6176 states and 15751 transitions. [2022-02-15 13:54:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:54:58,921 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 30 [2022-02-15 13:54:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:54:58,929 INFO L225 Difference]: With dead ends: 6176 [2022-02-15 13:54:58,929 INFO L226 Difference]: Without dead ends: 6165 [2022-02-15 13:54:58,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=2820, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:54:58,930 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:54:58,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 323 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2708 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:54:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-02-15 13:54:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 3528. [2022-02-15 13:54:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.5398355542954354) internal successors, (8958), 3527 states have internal predecessors, (8958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:54:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 8958 transitions. [2022-02-15 13:54:58,978 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 8958 transitions. Word has length 30 [2022-02-15 13:54:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:54:58,978 INFO L470 AbstractCegarLoop]: Abstraction has 3528 states and 8958 transitions. [2022-02-15 13:54:58,979 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 13:54:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 8958 transitions. [2022-02-15 13:54:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:54:58,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:54:58,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:54:58,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-15 13:54:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:59,183 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:54:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:54:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1360392850, now seen corresponding path program 89 times [2022-02-15 13:54:59,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:54:59,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654172069] [2022-02-15 13:54:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:54:59,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:54:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:54:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:59,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:54:59,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654172069] [2022-02-15 13:54:59,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654172069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:54:59,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293130964] [2022-02-15 13:54:59,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:54:59,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:54:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:54:59,470 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:54:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-15 13:54:59,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:54:59,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:54:59,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:54:59,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:54:59,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:54:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:54:59,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:00,073 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:00,073 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:00,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:00,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:55:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:00,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293130964] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:00,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:00,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-15 13:55:00,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109938175] [2022-02-15 13:55:00,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:00,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:55:00,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:55:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:55:00,185 INFO L87 Difference]: Start difference. First operand 3528 states and 8958 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:01,823 INFO L93 Difference]: Finished difference Result 6052 states and 15465 transitions. [2022-02-15 13:55:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:55:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:55:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:01,833 INFO L225 Difference]: With dead ends: 6052 [2022-02-15 13:55:01,833 INFO L226 Difference]: Without dead ends: 6037 [2022-02-15 13:55:01,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:55:01,834 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 269 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:01,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 215 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:55:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2022-02-15 13:55:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 3529. [2022-02-15 13:55:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.5396825396825395) internal successors, (8960), 3528 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8960 transitions. [2022-02-15 13:55:01,890 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8960 transitions. Word has length 30 [2022-02-15 13:55:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:01,891 INFO L470 AbstractCegarLoop]: Abstraction has 3529 states and 8960 transitions. [2022-02-15 13:55:01,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8960 transitions. [2022-02-15 13:55:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:01,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:01,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:01,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:02,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:02,110 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -695189682, now seen corresponding path program 90 times [2022-02-15 13:55:02,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:02,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804980434] [2022-02-15 13:55:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:02,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:02,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:02,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804980434] [2022-02-15 13:55:02,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804980434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:02,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740460360] [2022-02-15 13:55:02,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:55:02,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:02,389 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-15 13:55:02,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:55:02,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:02,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:02,686 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:55:02,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-15 13:55:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:02,909 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:02,910 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:02,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:02,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:02,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740460360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:02,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:02,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-15 13:55:02,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674768341] [2022-02-15 13:55:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:55:02,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:55:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:55:02,993 INFO L87 Difference]: Start difference. First operand 3529 states and 8960 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:04,561 INFO L93 Difference]: Finished difference Result 6011 states and 15365 transitions. [2022-02-15 13:55:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:55:04,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:55:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:04,570 INFO L225 Difference]: With dead ends: 6011 [2022-02-15 13:55:04,570 INFO L226 Difference]: Without dead ends: 5983 [2022-02-15 13:55:04,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=400, Invalid=2570, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:55:04,571 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 274 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:04,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 211 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:55:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2022-02-15 13:55:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3498. [2022-02-15 13:55:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 2.5390334572490705) internal successors, (8879), 3497 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 8879 transitions. [2022-02-15 13:55:04,622 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 8879 transitions. Word has length 30 [2022-02-15 13:55:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:04,622 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 8879 transitions. [2022-02-15 13:55:04,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 8879 transitions. [2022-02-15 13:55:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:04,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:04,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:04,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:04,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:04,839 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash -272860144, now seen corresponding path program 91 times [2022-02-15 13:55:04,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:04,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054950812] [2022-02-15 13:55:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:04,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:05,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:05,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054950812] [2022-02-15 13:55:05,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054950812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:05,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700794001] [2022-02-15 13:55:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:55:05,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:05,054 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:05,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-15 13:55:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:05,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:05,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:55:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:05,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:05,676 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:05,676 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:05,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:05,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:05,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:05,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:55:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:05,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700794001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:05,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:05,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:05,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425462999] [2022-02-15 13:55:05,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:05,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:05,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:05,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:05,785 INFO L87 Difference]: Start difference. First operand 3498 states and 8879 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 13:55:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:07,599 INFO L93 Difference]: Finished difference Result 6233 states and 15875 transitions. [2022-02-15 13:55:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:55:07,599 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 30 [2022-02-15 13:55:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:07,606 INFO L225 Difference]: With dead ends: 6233 [2022-02-15 13:55:07,606 INFO L226 Difference]: Without dead ends: 6218 [2022-02-15 13:55:07,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=601, Invalid=3955, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:55:07,607 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 370 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:07,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 258 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:55:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2022-02-15 13:55:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 3520. [2022-02-15 13:55:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 2.5385052571753337) internal successors, (8933), 3519 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 8933 transitions. [2022-02-15 13:55:07,655 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 8933 transitions. Word has length 30 [2022-02-15 13:55:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 8933 transitions. [2022-02-15 13:55:07,656 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 13:55:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 8933 transitions. [2022-02-15 13:55:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:07,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:07,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:07,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:07,875 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1483540906, now seen corresponding path program 92 times [2022-02-15 13:55:07,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:07,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444975072] [2022-02-15 13:55:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:07,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:08,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:08,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444975072] [2022-02-15 13:55:08,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444975072] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:08,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240418663] [2022-02-15 13:55:08,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:55:08,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:08,084 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:08,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-15 13:55:08,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:55:08,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:08,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:08,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:55:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:08,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:08,500 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:08,501 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:08,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:08,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:08,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240418663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:08,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:08,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:55:08,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14113166] [2022-02-15 13:55:08,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:08,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:55:08,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:55:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:55:08,575 INFO L87 Difference]: Start difference. First operand 3520 states and 8933 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:10,201 INFO L93 Difference]: Finished difference Result 5759 states and 14673 transitions. [2022-02-15 13:55:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:55:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:55:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:10,210 INFO L225 Difference]: With dead ends: 5759 [2022-02-15 13:55:10,210 INFO L226 Difference]: Without dead ends: 5735 [2022-02-15 13:55:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=519, Invalid=3513, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:55:10,210 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 368 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:10,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 195 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:55:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5735 states. [2022-02-15 13:55:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5735 to 3520. [2022-02-15 13:55:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 2.5382210855356635) internal successors, (8932), 3519 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 8932 transitions. [2022-02-15 13:55:10,258 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 8932 transitions. Word has length 30 [2022-02-15 13:55:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:10,259 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 8932 transitions. [2022-02-15 13:55:10,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 8932 transitions. [2022-02-15 13:55:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:10,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:10,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:10,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-15 13:55:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:10,478 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2018985114, now seen corresponding path program 93 times [2022-02-15 13:55:10,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:10,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602486910] [2022-02-15 13:55:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:10,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:10,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:10,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602486910] [2022-02-15 13:55:10,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602486910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:10,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779055723] [2022-02-15 13:55:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:55:10,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:10,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:10,683 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:10,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-15 13:55:10,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:55:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:10,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:55:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:10,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:10,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-02-15 13:55:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:11,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:11,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:11,420 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2022-02-15 13:55:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:11,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779055723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:11,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:11,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 36 [2022-02-15 13:55:11,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510466771] [2022-02-15 13:55:11,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:55:11,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:55:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:55:11,481 INFO L87 Difference]: Start difference. First operand 3520 states and 8932 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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 13:55:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:13,692 INFO L93 Difference]: Finished difference Result 6419 states and 16223 transitions. [2022-02-15 13:55:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:55:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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 13:55:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:13,703 INFO L225 Difference]: With dead ends: 6419 [2022-02-15 13:55:13,703 INFO L226 Difference]: Without dead ends: 6399 [2022-02-15 13:55:13,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=853, Invalid=6457, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:55:13,704 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 303 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:13,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 249 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2371 Invalid, 0 Unknown, 742 Unchecked, 0.8s Time] [2022-02-15 13:55:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2022-02-15 13:55:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 3537. [2022-02-15 13:55:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3536 states have (on average 2.538744343891403) internal successors, (8977), 3536 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 8977 transitions. [2022-02-15 13:55:13,767 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 8977 transitions. Word has length 30 [2022-02-15 13:55:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:13,767 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 8977 transitions. [2022-02-15 13:55:13,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 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 13:55:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 8977 transitions. [2022-02-15 13:55:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:13,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:13,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:13,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:13,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-15 13:55:13,986 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1056560762, now seen corresponding path program 94 times [2022-02-15 13:55:13,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:13,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637784345] [2022-02-15 13:55:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:13,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:14,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:14,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637784345] [2022-02-15 13:55:14,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637784345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:14,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558590246] [2022-02-15 13:55:14,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:55:14,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:14,236 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:14,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-15 13:55:14,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:55:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:14,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:14,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:55:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:14,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:14,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:14,814 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:14,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:14,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:55:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:14,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558590246] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:14,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:14,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:14,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913034620] [2022-02-15 13:55:14,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:14,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:14,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:14,930 INFO L87 Difference]: Start difference. First operand 3537 states and 8977 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 13:55:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:17,306 INFO L93 Difference]: Finished difference Result 6025 states and 15335 transitions. [2022-02-15 13:55:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:55:17,306 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 30 [2022-02-15 13:55:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:17,315 INFO L225 Difference]: With dead ends: 6025 [2022-02-15 13:55:17,315 INFO L226 Difference]: Without dead ends: 6010 [2022-02-15 13:55:17,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=634, Invalid=4478, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:55:17,315 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 450 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:17,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 294 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 13:55:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2022-02-15 13:55:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 3573. [2022-02-15 13:55:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 2.5389137737961924) internal successors, (9069), 3572 states have internal predecessors, (9069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 9069 transitions. [2022-02-15 13:55:17,366 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 9069 transitions. Word has length 30 [2022-02-15 13:55:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 9069 transitions. [2022-02-15 13:55:17,366 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 13:55:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 9069 transitions. [2022-02-15 13:55:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:17,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:17,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:17,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-02-15 13:55:17,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-15 13:55:17,586 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 699840288, now seen corresponding path program 95 times [2022-02-15 13:55:17,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:17,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56793633] [2022-02-15 13:55:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:17,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:17,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:17,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56793633] [2022-02-15 13:55:17,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56793633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:17,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396378401] [2022-02-15 13:55:17,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:55:17,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:17,869 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:17,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-15 13:55:17,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:55:17,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:17,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:18,188 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 13:55:18,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-15 13:55:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:18,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:18,370 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:18,371 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:18,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:18,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396378401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:18,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:18,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:55:18,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296466679] [2022-02-15 13:55:18,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:18,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:55:18,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:55:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:55:18,438 INFO L87 Difference]: Start difference. First operand 3573 states and 9069 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:20,359 INFO L93 Difference]: Finished difference Result 6054 states and 15430 transitions. [2022-02-15 13:55:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:55:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:55:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:20,368 INFO L225 Difference]: With dead ends: 6054 [2022-02-15 13:55:20,368 INFO L226 Difference]: Without dead ends: 6028 [2022-02-15 13:55:20,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=645, Invalid=4467, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:55:20,369 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 436 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 256 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:55:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2022-02-15 13:55:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3587. [2022-02-15 13:55:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.538482989403235) internal successors, (9103), 3586 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9103 transitions. [2022-02-15 13:55:20,426 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9103 transitions. Word has length 30 [2022-02-15 13:55:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9103 transitions. [2022-02-15 13:55:20,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9103 transitions. [2022-02-15 13:55:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:20,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:20,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:20,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:20,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-15 13:55:20,643 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1235284496, now seen corresponding path program 96 times [2022-02-15 13:55:20,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:20,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613966616] [2022-02-15 13:55:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:20,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:20,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:20,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613966616] [2022-02-15 13:55:20,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613966616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:20,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701268850] [2022-02-15 13:55:20,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:55:20,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:20,845 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:20,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-15 13:55:20,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:55:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:20,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:55:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:21,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:21,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-15 13:55:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:21,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:21,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:21,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:21,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:21,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-15 13:55:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:21,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701268850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:21,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:21,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-02-15 13:55:21,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059847293] [2022-02-15 13:55:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:21,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:55:21,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:55:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:55:21,786 INFO L87 Difference]: Start difference. First operand 3587 states and 9103 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 13:55:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:24,009 INFO L93 Difference]: Finished difference Result 4827 states and 12132 transitions. [2022-02-15 13:55:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:55:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 30 [2022-02-15 13:55:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:24,016 INFO L225 Difference]: With dead ends: 4827 [2022-02-15 13:55:24,016 INFO L226 Difference]: Without dead ends: 4802 [2022-02-15 13:55:24,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=793, Invalid=5059, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:55:24,017 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 414 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:24,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 231 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1397 Invalid, 0 Unknown, 1378 Unchecked, 0.5s Time] [2022-02-15 13:55:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-02-15 13:55:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 3638. [2022-02-15 13:55:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 2.537805883970305) internal successors, (9230), 3637 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 9230 transitions. [2022-02-15 13:55:24,059 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 9230 transitions. Word has length 30 [2022-02-15 13:55:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 3638 states and 9230 transitions. [2022-02-15 13:55:24,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 13:55:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 9230 transitions. [2022-02-15 13:55:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:24,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:24,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:24,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:24,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-15 13:55:24,279 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1485763794, now seen corresponding path program 97 times [2022-02-15 13:55:24,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:24,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246300995] [2022-02-15 13:55:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:24,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:24,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:24,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246300995] [2022-02-15 13:55:24,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246300995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:24,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052315759] [2022-02-15 13:55:24,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:55:24,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:24,477 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:24,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-15 13:55:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:24,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:24,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:24,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:55:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:24,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:24,938 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:24,938 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:24,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:25,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052315759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:25,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:25,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:25,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746904543] [2022-02-15 13:55:25,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:25,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:25,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:25,010 INFO L87 Difference]: Start difference. First operand 3638 states and 9230 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:26,675 INFO L93 Difference]: Finished difference Result 5389 states and 13615 transitions. [2022-02-15 13:55:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:55:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:55:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:26,683 INFO L225 Difference]: With dead ends: 5389 [2022-02-15 13:55:26,683 INFO L226 Difference]: Without dead ends: 5356 [2022-02-15 13:55:26,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=470, Invalid=3562, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:55:26,683 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 413 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 268 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:55:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-02-15 13:55:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 3612. [2022-02-15 13:55:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5383550263085017) internal successors, (9166), 3611 states have internal predecessors, (9166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9166 transitions. [2022-02-15 13:55:26,728 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9166 transitions. Word has length 30 [2022-02-15 13:55:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:26,728 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 9166 transitions. [2022-02-15 13:55:26,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9166 transitions. [2022-02-15 13:55:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:26,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:26,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:26,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-02-15 13:55:26,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-15 13:55:26,947 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1640030634, now seen corresponding path program 98 times [2022-02-15 13:55:26,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:26,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605928264] [2022-02-15 13:55:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:26,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:27,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:27,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605928264] [2022-02-15 13:55:27,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605928264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:27,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184614030] [2022-02-15 13:55:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:55:27,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:27,200 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:27,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-15 13:55:27,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:55:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:27,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:27,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:55:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:27,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:27,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:27,756 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:27,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:27,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:27,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184614030] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:27,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:27,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:27,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907999541] [2022-02-15 13:55:27,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:27,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:27,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:27,837 INFO L87 Difference]: Start difference. First operand 3612 states and 9166 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:29,930 INFO L93 Difference]: Finished difference Result 5427 states and 13691 transitions. [2022-02-15 13:55:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:55:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:29,938 INFO L225 Difference]: With dead ends: 5427 [2022-02-15 13:55:29,938 INFO L226 Difference]: Without dead ends: 5366 [2022-02-15 13:55:29,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:55:29,939 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 447 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:29,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 286 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:55:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-02-15 13:55:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 3603. [2022-02-15 13:55:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.53858967240422) internal successors, (9144), 3602 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9144 transitions. [2022-02-15 13:55:29,987 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9144 transitions. Word has length 30 [2022-02-15 13:55:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:29,987 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 9144 transitions. [2022-02-15 13:55:29,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9144 transitions. [2022-02-15 13:55:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:29,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:29,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:30,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:30,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-02-15 13:55:30,207 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1771895664, now seen corresponding path program 99 times [2022-02-15 13:55:30,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:30,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34887084] [2022-02-15 13:55:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:30,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:30,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:30,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34887084] [2022-02-15 13:55:30,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34887084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:30,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629376105] [2022-02-15 13:55:30,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:55:30,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:30,496 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:30,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-15 13:55:30,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:55:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:30,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:30,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:55:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:30,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:31,156 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:31,156 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-15 13:55:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:31,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629376105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:31,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:31,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:31,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159758685] [2022-02-15 13:55:31,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:31,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:31,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:31,282 INFO L87 Difference]: Start difference. First operand 3603 states and 9144 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 13:55:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:32,792 INFO L93 Difference]: Finished difference Result 6293 states and 16040 transitions. [2022-02-15 13:55:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:55:32,792 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 30 [2022-02-15 13:55:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:32,802 INFO L225 Difference]: With dead ends: 6293 [2022-02-15 13:55:32,802 INFO L226 Difference]: Without dead ends: 6278 [2022-02-15 13:55:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=502, Invalid=3530, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:55:32,803 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 401 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:32,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 366 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:55:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-02-15 13:55:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 3623. [2022-02-15 13:55:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.538928768636113) internal successors, (9196), 3622 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 9196 transitions. [2022-02-15 13:55:32,874 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 9196 transitions. Word has length 30 [2022-02-15 13:55:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 9196 transitions. [2022-02-15 13:55:32,874 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 13:55:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 9196 transitions. [2022-02-15 13:55:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:32,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:32,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:32,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:33,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:33,091 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -15494614, now seen corresponding path program 100 times [2022-02-15 13:55:33,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:33,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382531213] [2022-02-15 13:55:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:33,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:33,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382531213] [2022-02-15 13:55:33,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382531213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127667917] [2022-02-15 13:55:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:55:33,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:33,278 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-15 13:55:33,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:55:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:33,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:33,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:55:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:33,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:33,670 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:33,671 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:33,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:33,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:33,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:33,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127667917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:33,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:33,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-15 13:55:33,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101721544] [2022-02-15 13:55:33,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:33,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:55:33,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:55:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:55:33,737 INFO L87 Difference]: Start difference. First operand 3623 states and 9196 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:35,084 INFO L93 Difference]: Finished difference Result 6289 states and 16030 transitions. [2022-02-15 13:55:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:55:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 30 [2022-02-15 13:55:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:35,093 INFO L225 Difference]: With dead ends: 6289 [2022-02-15 13:55:35,094 INFO L226 Difference]: Without dead ends: 6265 [2022-02-15 13:55:35,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=494, Invalid=3412, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:55:35,094 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:35,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 316 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:55:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6265 states. [2022-02-15 13:55:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6265 to 3623. [2022-02-15 13:55:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.538928768636113) internal successors, (9196), 3622 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 9196 transitions. [2022-02-15 13:55:35,144 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 9196 transitions. Word has length 30 [2022-02-15 13:55:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 9196 transitions. [2022-02-15 13:55:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 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 13:55:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 9196 transitions. [2022-02-15 13:55:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:35,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:35,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:35,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:35,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:35,364 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash 519949594, now seen corresponding path program 101 times [2022-02-15 13:55:35,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:35,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149891695] [2022-02-15 13:55:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:35,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:35,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:35,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149891695] [2022-02-15 13:55:35,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149891695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:35,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927748942] [2022-02-15 13:55:35,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:55:35,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:35,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:35,546 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:35,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-15 13:55:35,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:55:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:35,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:35,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-15 13:55:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:35,973 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:35,974 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:36,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:36,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927748942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:36,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:36,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:36,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199551517] [2022-02-15 13:55:36,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:36,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:36,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:36,048 INFO L87 Difference]: Start difference. First operand 3623 states and 9196 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:37,405 INFO L93 Difference]: Finished difference Result 5563 states and 14012 transitions. [2022-02-15 13:55:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:55:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:37,413 INFO L225 Difference]: With dead ends: 5563 [2022-02-15 13:55:37,413 INFO L226 Difference]: Without dead ends: 5536 [2022-02-15 13:55:37,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:55:37,414 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:37,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 363 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:55:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2022-02-15 13:55:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 3621. [2022-02-15 13:55:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 2.5386740331491713) internal successors, (9190), 3620 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 9190 transitions. [2022-02-15 13:55:37,460 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 9190 transitions. Word has length 30 [2022-02-15 13:55:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:37,460 INFO L470 AbstractCegarLoop]: Abstraction has 3621 states and 9190 transitions. [2022-02-15 13:55:37,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 13:55:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 9190 transitions. [2022-02-15 13:55:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:37,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:37,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:37,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-02-15 13:55:37,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:37,676 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1117622862, now seen corresponding path program 102 times [2022-02-15 13:55:37,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:37,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937829833] [2022-02-15 13:55:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:37,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:37,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:37,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937829833] [2022-02-15 13:55:37,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937829833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:37,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281363723] [2022-02-15 13:55:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:55:37,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:37,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:37,944 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:37,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-15 13:55:37,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:55:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:37,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:55:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:38,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:38,236 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 3 case distinctions, treesize of input 24 treesize of output 40 [2022-02-15 13:55:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:38,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:38,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:38,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:38,746 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-02-15 13:55:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:38,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281363723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:38,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:38,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-02-15 13:55:38,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114524213] [2022-02-15 13:55:38,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:55:38,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:55:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:55:38,816 INFO L87 Difference]: Start difference. First operand 3621 states and 9190 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 13:55:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:40,229 INFO L93 Difference]: Finished difference Result 4706 states and 11930 transitions. [2022-02-15 13:55:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:55:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 13:55:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:40,237 INFO L225 Difference]: With dead ends: 4706 [2022-02-15 13:55:40,237 INFO L226 Difference]: Without dead ends: 4687 [2022-02-15 13:55:40,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=526, Invalid=3506, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:55:40,238 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 226 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1681 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 231 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1157 Invalid, 0 Unknown, 1681 Unchecked, 0.4s Time] [2022-02-15 13:55:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2022-02-15 13:55:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3640. [2022-02-15 13:55:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 2.535586699642759) internal successors, (9227), 3639 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 9227 transitions. [2022-02-15 13:55:40,282 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 9227 transitions. Word has length 30 [2022-02-15 13:55:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:40,282 INFO L470 AbstractCegarLoop]: Abstraction has 3640 states and 9227 transitions. [2022-02-15 13:55:40,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 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 13:55:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 9227 transitions. [2022-02-15 13:55:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:40,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:40,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:40,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:40,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:40,501 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash -867143564, now seen corresponding path program 103 times [2022-02-15 13:55:40,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:40,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921969191] [2022-02-15 13:55:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:40,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:40,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:40,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921969191] [2022-02-15 13:55:40,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921969191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:40,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189359270] [2022-02-15 13:55:40,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:55:40,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:40,779 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-15 13:55:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:40,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:41,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-15 13:55:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:41,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:41,449 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:41,450 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:41,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:41,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:41,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:41,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189359270] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:41,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:41,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-15 13:55:41,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556361272] [2022-02-15 13:55:41,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:41,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:55:41,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:55:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:55:41,533 INFO L87 Difference]: Start difference. First operand 3640 states and 9227 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:43,044 INFO L93 Difference]: Finished difference Result 5755 states and 14429 transitions. [2022-02-15 13:55:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:55:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-15 13:55:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:43,053 INFO L225 Difference]: With dead ends: 5755 [2022-02-15 13:55:43,053 INFO L226 Difference]: Without dead ends: 5686 [2022-02-15 13:55:43,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:55:43,054 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 388 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:43,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 405 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2982 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 13:55:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-02-15 13:55:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3606. [2022-02-15 13:55:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.5384188626907074) internal successors, (9151), 3605 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9151 transitions. [2022-02-15 13:55:43,104 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9151 transitions. Word has length 30 [2022-02-15 13:55:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:43,104 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 9151 transitions. [2022-02-15 13:55:43,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9151 transitions. [2022-02-15 13:55:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:43,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:43,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:43,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-02-15 13:55:43,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:43,323 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:43,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1543940080, now seen corresponding path program 104 times [2022-02-15 13:55:43,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:43,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27589730] [2022-02-15 13:55:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:43,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:43,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:43,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27589730] [2022-02-15 13:55:43,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27589730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:43,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828003562] [2022-02-15 13:55:43,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:55:43,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:43,508 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:43,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-15 13:55:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:55:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:43,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:55:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:43,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:43,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-15 13:55:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:43,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:44,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:44,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:44,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-15 13:55:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:44,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828003562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:44,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:44,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-02-15 13:55:44,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223091473] [2022-02-15 13:55:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:55:44,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:55:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:55:44,290 INFO L87 Difference]: Start difference. First operand 3606 states and 9151 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 13:55:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:45,125 INFO L93 Difference]: Finished difference Result 5040 states and 12726 transitions. [2022-02-15 13:55:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:55:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 30 [2022-02-15 13:55:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:45,132 INFO L225 Difference]: With dead ends: 5040 [2022-02-15 13:55:45,132 INFO L226 Difference]: Without dead ends: 5027 [2022-02-15 13:55:45,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=415, Invalid=2341, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:55:45,133 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 192 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:45,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 161 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 679 Invalid, 0 Unknown, 677 Unchecked, 0.2s Time] [2022-02-15 13:55:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-02-15 13:55:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 3621. [2022-02-15 13:55:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 2.537845303867403) internal successors, (9187), 3620 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 9187 transitions. [2022-02-15 13:55:45,177 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 9187 transitions. Word has length 30 [2022-02-15 13:55:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 3621 states and 9187 transitions. [2022-02-15 13:55:45,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 13:55:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 9187 transitions. [2022-02-15 13:55:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:45,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:45,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:45,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:45,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-15 13:55:45,396 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2109735470, now seen corresponding path program 94 times [2022-02-15 13:55:45,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:45,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446988939] [2022-02-15 13:55:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:45,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:45,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:45,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446988939] [2022-02-15 13:55:45,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446988939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:45,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826487763] [2022-02-15 13:55:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:55:45,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:45,613 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:45,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-15 13:55:45,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:55:45,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:45,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:45,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-15 13:55:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:45,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:46,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:46,051 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:46,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:46,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:46,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826487763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:46,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:46,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:55:46,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038424235] [2022-02-15 13:55:46,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:55:46,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:55:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:46,125 INFO L87 Difference]: Start difference. First operand 3621 states and 9187 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 13:55:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:47,217 INFO L93 Difference]: Finished difference Result 6540 states and 16658 transitions. [2022-02-15 13:55:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:55:47,217 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 30 [2022-02-15 13:55:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:47,228 INFO L225 Difference]: With dead ends: 6540 [2022-02-15 13:55:47,228 INFO L226 Difference]: Without dead ends: 6529 [2022-02-15 13:55:47,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=448, Invalid=3212, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:55:47,229 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 314 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:47,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 223 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:55:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2022-02-15 13:55:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 3621. [2022-02-15 13:55:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 2.537845303867403) internal successors, (9187), 3620 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 9187 transitions. [2022-02-15 13:55:47,288 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 9187 transitions. Word has length 30 [2022-02-15 13:55:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:47,288 INFO L470 AbstractCegarLoop]: Abstraction has 3621 states and 9187 transitions. [2022-02-15 13:55:47,288 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 13:55:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 9187 transitions. [2022-02-15 13:55:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:47,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:47,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:47,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:47,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-15 13:55:47,507 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:47,508 INFO L85 PathProgramCache]: Analyzing trace with hash -428830776, now seen corresponding path program 95 times [2022-02-15 13:55:47,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:47,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830396473] [2022-02-15 13:55:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:47,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:47,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830396473] [2022-02-15 13:55:47,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830396473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:47,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983926847] [2022-02-15 13:55:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:55:47,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:47,693 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:47,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-15 13:55:47,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:55:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:47,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:47,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-15 13:55:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:47,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:48,090 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:48,090 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:55:48,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:48,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:48,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:48,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983926847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:48,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:48,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:55:48,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884172707] [2022-02-15 13:55:48,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:48,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:55:48,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:55:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:55:48,167 INFO L87 Difference]: Start difference. First operand 3621 states and 9187 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:55:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:49,223 INFO L93 Difference]: Finished difference Result 6502 states and 16536 transitions. [2022-02-15 13:55:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:55:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:55:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:49,233 INFO L225 Difference]: With dead ends: 6502 [2022-02-15 13:55:49,233 INFO L226 Difference]: Without dead ends: 6469 [2022-02-15 13:55:49,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=456, Invalid=3204, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:55:49,233 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 378 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:49,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 284 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:55:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2022-02-15 13:55:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 3640. [2022-02-15 13:55:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 2.5380599065677383) internal successors, (9236), 3639 states have internal predecessors, (9236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 9236 transitions. [2022-02-15 13:55:49,287 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 9236 transitions. Word has length 30 [2022-02-15 13:55:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:49,287 INFO L470 AbstractCegarLoop]: Abstraction has 3640 states and 9236 transitions. [2022-02-15 13:55:49,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:55:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 9236 transitions. [2022-02-15 13:55:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:49,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:49,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:49,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:49,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-15 13:55:49,507 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2000170688, now seen corresponding path program 96 times [2022-02-15 13:55:49,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:49,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152945565] [2022-02-15 13:55:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:49,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:49,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:49,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152945565] [2022-02-15 13:55:49,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152945565] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:49,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932245192] [2022-02-15 13:55:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:55:49,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:49,709 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:49,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-15 13:55:49,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:55:49,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:49,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 13:55:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:50,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:50,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:50,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-02-15 13:55:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:50,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:50,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:50,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:50,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-15 13:55:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:50,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932245192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:50,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:50,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-02-15 13:55:50,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607302428] [2022-02-15 13:55:50,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:50,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 13:55:50,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 13:55:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:55:50,860 INFO L87 Difference]: Start difference. First operand 3640 states and 9236 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 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 13:55:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:52,037 INFO L93 Difference]: Finished difference Result 5498 states and 13870 transitions. [2022-02-15 13:55:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:55:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 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 30 [2022-02-15 13:55:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:52,045 INFO L225 Difference]: With dead ends: 5498 [2022-02-15 13:55:52,045 INFO L226 Difference]: Without dead ends: 5486 [2022-02-15 13:55:52,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=2862, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:55:52,045 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 308 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1329 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:52,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 235 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1057 Invalid, 0 Unknown, 1329 Unchecked, 0.3s Time] [2022-02-15 13:55:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-02-15 13:55:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 3684. [2022-02-15 13:55:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 2.537062177572631) internal successors, (9344), 3683 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 9344 transitions. [2022-02-15 13:55:52,092 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 9344 transitions. Word has length 30 [2022-02-15 13:55:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:52,093 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 9344 transitions. [2022-02-15 13:55:52,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 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 13:55:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 9344 transitions. [2022-02-15 13:55:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:52,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:52,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:52,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:52,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-15 13:55:52,312 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 583898304, now seen corresponding path program 97 times [2022-02-15 13:55:52,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:52,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394009934] [2022-02-15 13:55:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:52,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:52,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:52,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394009934] [2022-02-15 13:55:52,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394009934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:52,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441951167] [2022-02-15 13:55:52,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:55:52,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:52,481 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-15 13:55:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:52,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:52,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-15 13:55:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:52,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:52,927 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:52,928 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:55:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:52,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:53,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441951167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:53,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:53,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-02-15 13:55:53,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936259022] [2022-02-15 13:55:53,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:53,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:55:53,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:55:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:55:53,006 INFO L87 Difference]: Start difference. First operand 3684 states and 9344 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 13:55:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:54,505 INFO L93 Difference]: Finished difference Result 6104 states and 15310 transitions. [2022-02-15 13:55:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:55:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 30 [2022-02-15 13:55:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:54,514 INFO L225 Difference]: With dead ends: 6104 [2022-02-15 13:55:54,515 INFO L226 Difference]: Without dead ends: 6060 [2022-02-15 13:55:54,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=3700, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:55:54,515 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 383 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:54,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 386 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:55:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6060 states. [2022-02-15 13:55:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 3655. [2022-02-15 13:55:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 2.5372194854953474) internal successors, (9271), 3654 states have internal predecessors, (9271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 9271 transitions. [2022-02-15 13:55:54,572 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 9271 transitions. Word has length 30 [2022-02-15 13:55:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 9271 transitions. [2022-02-15 13:55:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 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 13:55:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 9271 transitions. [2022-02-15 13:55:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:54,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:54,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:54,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-15 13:55:54,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-02-15 13:55:54,779 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash 981551584, now seen corresponding path program 98 times [2022-02-15 13:55:54,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:54,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988003158] [2022-02-15 13:55:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:54,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:55,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:55,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988003158] [2022-02-15 13:55:55,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988003158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:55,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315494108] [2022-02-15 13:55:55,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:55:55,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:55,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:55,040 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:55,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-15 13:55:55,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:55:55,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:55,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 13:55:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:55,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:55,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2022-02-15 13:55:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:55,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:56,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:56,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:55:56,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-15 13:55:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:56,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315494108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:56,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:56,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2022-02-15 13:55:56,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536934113] [2022-02-15 13:55:56,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:56,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 13:55:56,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 13:55:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:55:56,382 INFO L87 Difference]: Start difference. First operand 3655 states and 9271 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 13:55:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:55:57,509 INFO L93 Difference]: Finished difference Result 5147 states and 12994 transitions. [2022-02-15 13:55:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:55:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 30 [2022-02-15 13:55:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:55:57,516 INFO L225 Difference]: With dead ends: 5147 [2022-02-15 13:55:57,516 INFO L226 Difference]: Without dead ends: 5134 [2022-02-15 13:55:57,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:55:57,517 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 315 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:55:57,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 157 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 585 Invalid, 0 Unknown, 1121 Unchecked, 0.3s Time] [2022-02-15 13:55:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5134 states. [2022-02-15 13:55:57,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5134 to 3652. [2022-02-15 13:55:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.5373870172555466) internal successors, (9264), 3651 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:55:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9264 transitions. [2022-02-15 13:55:57,559 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9264 transitions. Word has length 30 [2022-02-15 13:55:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:55:57,559 INFO L470 AbstractCegarLoop]: Abstraction has 3652 states and 9264 transitions. [2022-02-15 13:55:57,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 13:55:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9264 transitions. [2022-02-15 13:55:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:55:57,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:55:57,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:55:57,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-15 13:55:57,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:57,763 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:55:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:55:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1794473846, now seen corresponding path program 99 times [2022-02-15 13:55:57,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:55:57,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849377639] [2022-02-15 13:55:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:55:57,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:55:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:55:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:58,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:55:58,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849377639] [2022-02-15 13:55:58,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849377639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:55:58,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992794857] [2022-02-15 13:55:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:55:58,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:55:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:55:58,034 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:55:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-15 13:55:58,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:55:58,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:55:58,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:55:58,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:55:58,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-15 13:55:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:55:58,672 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:55:58,672 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:55:58,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:58,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:55:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:55:58,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:55:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:55:58,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992794857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:55:58,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:55:58,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:55:58,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986088336] [2022-02-15 13:55:58,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:55:58,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:55:58,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:55:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:55:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:55:58,789 INFO L87 Difference]: Start difference. First operand 3652 states and 9264 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 13:56:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:01,596 INFO L93 Difference]: Finished difference Result 6436 states and 16370 transitions. [2022-02-15 13:56:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:56:01,596 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 30 [2022-02-15 13:56:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:01,606 INFO L225 Difference]: With dead ends: 6436 [2022-02-15 13:56:01,606 INFO L226 Difference]: Without dead ends: 6425 [2022-02-15 13:56:01,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=682, Invalid=5480, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:56:01,607 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 361 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:01,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 240 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 13:56:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6425 states. [2022-02-15 13:56:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6425 to 3675. [2022-02-15 13:56:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 3674 states have (on average 2.537833424060969) internal successors, (9324), 3674 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 9324 transitions. [2022-02-15 13:56:01,668 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 9324 transitions. Word has length 30 [2022-02-15 13:56:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:01,668 INFO L470 AbstractCegarLoop]: Abstraction has 3675 states and 9324 transitions. [2022-02-15 13:56:01,668 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 13:56:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 9324 transitions. [2022-02-15 13:56:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:56:01,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:01,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:01,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-02-15 13:56:01,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-02-15 13:56:01,901 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash -744092400, now seen corresponding path program 100 times [2022-02-15 13:56:01,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:01,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905874111] [2022-02-15 13:56:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:01,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:02,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:02,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905874111] [2022-02-15 13:56:02,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905874111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:02,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082177775] [2022-02-15 13:56:02,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:56:02,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:02,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:02,201 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-15 13:56:02,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:56:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:02,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:56:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:02,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:56:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:02,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:02,845 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:56:02,845 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:56:02,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:02,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:56:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:02,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082177775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:02,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:02,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:56:02,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037987187] [2022-02-15 13:56:02,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:02,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:56:02,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:56:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:56:02,966 INFO L87 Difference]: Start difference. First operand 3675 states and 9324 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:56:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:05,435 INFO L93 Difference]: Finished difference Result 6456 states and 16419 transitions. [2022-02-15 13:56:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:56:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 30 [2022-02-15 13:56:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:05,444 INFO L225 Difference]: With dead ends: 6456 [2022-02-15 13:56:05,445 INFO L226 Difference]: Without dead ends: 6412 [2022-02-15 13:56:05,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=863, Invalid=6619, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:56:05,445 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 376 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 3648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:05,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 347 Invalid, 3648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:56:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2022-02-15 13:56:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 3684. [2022-02-15 13:56:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3684 states, 3683 states have (on average 2.5376052131414606) internal successors, (9346), 3683 states have internal predecessors, (9346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 9346 transitions. [2022-02-15 13:56:05,497 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 9346 transitions. Word has length 30 [2022-02-15 13:56:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:05,497 INFO L470 AbstractCegarLoop]: Abstraction has 3684 states and 9346 transitions. [2022-02-15 13:56:05,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 13:56:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 9346 transitions. [2022-02-15 13:56:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:56:05,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:05,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:05,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:05,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:05,718 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 784861668, now seen corresponding path program 101 times [2022-02-15 13:56:05,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:05,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109835822] [2022-02-15 13:56:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:05,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:05,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:05,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109835822] [2022-02-15 13:56:05,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109835822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:05,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303435942] [2022-02-15 13:56:05,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:56:05,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:05,902 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:05,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-15 13:56:05,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:56:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:05,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:56:05,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:06,185 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-15 13:56:06,185 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 104 treesize of output 76 [2022-02-15 13:56:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:06,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:06,387 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:56:06,388 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:56:06,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:06,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:06,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:56:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:06,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303435942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:06,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:06,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-02-15 13:56:06,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169147731] [2022-02-15 13:56:06,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:56:06,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:56:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:56:06,465 INFO L87 Difference]: Start difference. First operand 3684 states and 9346 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 13:56:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:08,661 INFO L93 Difference]: Finished difference Result 5883 states and 14804 transitions. [2022-02-15 13:56:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:56:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 30 [2022-02-15 13:56:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:08,670 INFO L225 Difference]: With dead ends: 5883 [2022-02-15 13:56:08,670 INFO L226 Difference]: Without dead ends: 5841 [2022-02-15 13:56:08,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=5048, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:56:08,671 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 455 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:08,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 283 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3095 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 13:56:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-02-15 13:56:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 3672. [2022-02-15 13:56:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 2.537455734132389) internal successors, (9315), 3671 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 9315 transitions. [2022-02-15 13:56:08,723 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 9315 transitions. Word has length 30 [2022-02-15 13:56:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:08,723 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 9315 transitions. [2022-02-15 13:56:08,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 13:56:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 9315 transitions. [2022-02-15 13:56:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:56:08,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:08,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:08,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-02-15 13:56:08,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:08,943 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash 468016472, now seen corresponding path program 102 times [2022-02-15 13:56:08,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:08,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417749781] [2022-02-15 13:56:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:08,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:09,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:09,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417749781] [2022-02-15 13:56:09,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417749781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:09,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550504821] [2022-02-15 13:56:09,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:56:09,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:09,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:09,217 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:09,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-15 13:56:09,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:56:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:56:09,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 13:56:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:09,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-15 13:56:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:09,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:09,671 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:56:09,671 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-15 13:56:09,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:09,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:09,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:56:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:09,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550504821] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:09,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:09,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-15 13:56:09,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312805922] [2022-02-15 13:56:09,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:09,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:56:09,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:56:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:56:09,738 INFO L87 Difference]: Start difference. First operand 3672 states and 9315 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 13:56:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:56:11,457 INFO L93 Difference]: Finished difference Result 6128 states and 15606 transitions. [2022-02-15 13:56:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:56:11,458 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 30 [2022-02-15 13:56:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:56:11,466 INFO L225 Difference]: With dead ends: 6128 [2022-02-15 13:56:11,466 INFO L226 Difference]: Without dead ends: 6117 [2022-02-15 13:56:11,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=638, Invalid=5062, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:56:11,466 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 284 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:11,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 193 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:56:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6117 states. [2022-02-15 13:56:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6117 to 3677. [2022-02-15 13:56:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 2.5372687704026116) internal successors, (9327), 3676 states have internal predecessors, (9327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:56:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 9327 transitions. [2022-02-15 13:56:11,521 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 9327 transitions. Word has length 30 [2022-02-15 13:56:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:56:11,521 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 9327 transitions. [2022-02-15 13:56:11,521 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 13:56:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 9327 transitions. [2022-02-15 13:56:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 13:56:11,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:56:11,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:56:11,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-15 13:56:11,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:11,727 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:56:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:56:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2070549774, now seen corresponding path program 103 times [2022-02-15 13:56:11,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:56:11,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688661542] [2022-02-15 13:56:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:56:11,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:56:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:11,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:56:11,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688661542] [2022-02-15 13:56:11,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688661542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:56:11,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516999250] [2022-02-15 13:56:11,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:56:11,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:56:11,935 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:56:11,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-15 13:56:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:56:11,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 13:56:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:56:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:12,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-15 13:56:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:12,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:56:12,386 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 13:56:12,386 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-15 13:56:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:12,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:56:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 13:56:12,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-15 13:56:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:56:12,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516999250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:56:12,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:56:12,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-15 13:56:12,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767386454] [2022-02-15 13:56:12,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:56:12,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:56:12,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:56:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:56:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:56:12,463 INFO L87 Difference]: Start difference. First operand 3677 states and 9327 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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) Received shutdown request... [2022-02-15 13:56:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:56:14,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=644, Invalid=4906, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:56:14,122 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 349 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:56:14,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 170 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:56:14,123 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 13:56:14,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-02-15 13:56:14,139 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 13:56:14,157 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 13:56:14,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:56:14,339 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3677states) and FLOYD_HOARE automaton (currently 61 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 75 known predicates. [2022-02-15 13:56:14,340 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 13:56:14,340 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 13:56:14,342 INFO L732 BasicCegarLoop]: Path program histogram: [104, 103, 76, 2, 1, 1] [2022-02-15 13:56:14,343 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 13:56:14,344 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 13:56:14,345 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:56:14 BasicIcfg [2022-02-15 13:56:14,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 13:56:14,345 INFO L158 Benchmark]: Toolchain (without parser) took 901015.11ms. Allocated memory was 186.6MB in the beginning and 576.7MB in the end (delta: 390.1MB). Free memory was 145.6MB in the beginning and 439.3MB in the end (delta: -293.7MB). Peak memory consumption was 97.3MB. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 186.6MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.86ms. Allocated memory is still 186.6MB. Free memory was 145.5MB in the beginning and 144.0MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 INFO L158 Benchmark]: Boogie Preprocessor took 17.41ms. Allocated memory is still 186.6MB. Free memory was 144.0MB in the beginning and 143.0MB in the end (delta: 984.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 INFO L158 Benchmark]: RCFGBuilder took 253.41ms. Allocated memory is still 186.6MB. Free memory was 143.0MB in the beginning and 133.5MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 INFO L158 Benchmark]: TraceAbstraction took 900720.16ms. Allocated memory was 186.6MB in the beginning and 576.7MB in the end (delta: 390.1MB). Free memory was 133.0MB in the beginning and 439.3MB in the end (delta: -306.3MB). Peak memory consumption was 83.6MB. Max. memory is 8.0GB. [2022-02-15 13:56:14,345 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 186.6MB. Free memory is still 146.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.86ms. Allocated memory is still 186.6MB. Free memory was 145.5MB in the beginning and 144.0MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.41ms. Allocated memory is still 186.6MB. Free memory was 144.0MB in the beginning and 143.0MB in the end (delta: 984.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.41ms. Allocated memory is still 186.6MB. Free memory was 143.0MB in the beginning and 133.5MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 900720.16ms. Allocated memory was 186.6MB in the beginning and 576.7MB in the end (delta: 390.1MB). Free memory was 133.0MB in the beginning and 439.3MB in the end (delta: -306.3MB). Peak memory consumption was 83.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3677states) and FLOYD_HOARE automaton (currently 61 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 75 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3677states) and FLOYD_HOARE automaton (currently 61 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 75 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3677states) and FLOYD_HOARE automaton (currently 61 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 75 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 900.7s, OverallIterations: 287, TraceHistogramMax: 2, PathProgramHistogramMax: 104, EmptinessCheckTime: 0.7s, AutomataDifference: 562.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110334 SdHoareTripleChecker+Valid, 225.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 110334 mSDsluCounter, 66631 SdHoareTripleChecker+Invalid, 193.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 67489 IncrementalHoareTripleChecker+Unchecked, 98956 mSDsCounter, 52118 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 588114 IncrementalHoareTripleChecker+Invalid, 707721 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52118 mSolverCounterUnsat, 6004 mSDtfsCounter, 588114 mSolverCounterSat, 1.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31338 GetRequests, 11552 SyntacticMatches, 1319 SemanticMatches, 18466 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 433282 ImplicationChecksByTransitivity, 427.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3684occurred in iteration=280, InterpolantAutomatonStates: 14797, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.4s AutomataMinimizationTime, 286 MinimizatonAttempts, 538191 StatesRemovedByMinimization, 286 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 258.5s InterpolantComputationTime, 16750 NumberOfCodeBlocks, 16727 NumberOfCodeBlocksAsserted, 1011 NumberOfCheckSat, 24253 ConstructedInterpolants, 507 QuantifiedInterpolants, 530416 SizeOfPredicates, 2428 NumberOfNonLiveVariables, 17302 ConjunctsInSsa, 8512 ConjunctsInUnsatCore, 857 InterpolantComputations, 2 PerfectInterpolantSequences, 139/9244 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